SPACE-TIME

Click here to explore your creativity and get 2 free months of Premium Membership: https://skl.sh/isaacarthur13 Is time travel possible, and if it is, what sort of civilizations would result? We'll explore the science that might permit it as well as the classic science fiction examples to see if they make sense. Visit our Website: http://www.isaacarthur.net Support us on Patreon: https://www.patreon.com/IsaacArthur SFIA Merchandise available: https://www.signil.com/sfia/ Social Media: Facebook Group: https://www.facebook.com/groups/1583992725237264/ Reddit: https://www.reddit.com/r/IsaacArthur/ Twitter: https://twitter.com/Isaac_A_Arthur on Twitter and RT our future content. SFIA Discord Server: https://discord.gg/53GAShE Listen or Download the audio of this episode from Soundcloud: Episode's Audio-only version: https://soundcloud.com/isaac-arthur-148927746/time-travel Episode's Narration-only version: https://soundcloud.com/isaac-arthur-148927746/time-travel-narration-only Credits: Time Travel Episode 219, Season 6 E01 Written by: Isaac Arthur Editors Darius Said Jerry Guern Keith Blockus Victoria Kelly Cover Art: Jakub Grygier https://www.artstation.com/jakub_grygier Graphics: Ken York https://www.facebook.com/YDVisual/ Sergio Botero https://www.artstation.com/sboterod?fref=gc Produced & Narrated by: Isaac Arthur Music: Lombus, "Cosmic Soup" https://lombus.bandcamp.com Aerium, "Fifth Star of Aldebaran" https://www.youtube.com/channel/UCRnUJY3l5vIJFGsY3XvW4dQ Markus Junnikkala, "Leaving the Galaxy" https://www.markusjunnikkala.com/ Stellardrone, "An Ocean of Galaxies" https://stellardrone.bandcamp.com

Figuring out that the speed of light was the ultimate speed limit of the universe is part of the late 19th-century and early 20th-century history of Physics. This is part 2 of my “history of the speed of light” series. Part 1 - How did we measure the speed of light? https://www.youtube.com/watch?v=V7PU1WN9jWY Michelson & Morley 1887 - http://www.ajsonline.org/content/s3-34/203/333.full.pdf ----- My phases of the Moon necklace and Moon earrings were gifted to me by Eclectic Eccentricity, who have a great selection of space-themed jewellery: https://eclecticeccentricity.co.uk/collections/cosmos Necklace: https://eclecticeccentricity.co.uk/products/roam-moon-phase-necklace?_pos=1&_sid=cd742dc82&_ss=r Earrings: https://eclecticeccentricity.co.uk/products/mahina-crescent-moon-studs ------ My new book 'Space: The 10 Things You Should Know' is out now worldwide! (except US & Canada) You can pre-order it from amazon here: http://bit.ly/SpaceDrBecky News on US & Canadian publication coming soon. Don't forget to subscribe and click the little bell icon to be notified when I post a new video! --------- Dr. Becky also presents videos on Sixty Symbols: https://www.youtube.com/user/sixtysymbols and Deep Sky Videos: https://www.youtube.com/user/DeepSkyVideos Dr Becky Smethurst is an astrophysicist researching galaxies and supermassive black holes at Christ Church at the University of Oxford. http://drbecky.uk.com https://rebeccasmethurst.co.uk

Is it possible to go backwards through time? We travel forwards every day, but traveling back could let us change our past, visit old friends, or manipulate the timeline to our benefit... Although our knowledge of space and time remains incomplete, we can still use what we know to consider possible time machines. But what kind of paradoxes would this entail and how can we resolve them? Join us today on a special journey through time. An educational video written and presented by Professor David Kipping All music used is licensed by SoundStripe.com ► "It's Always Darkest Before the Dawn" by Hill, licensed through SoundStripe.com: https://app.soundstripe.com/songs/7441 ► "Waking Up" by Atlas, licensed through SoundStripe.com: https://app.soundstripe.com/songs/3984 ► Cylinder Four (http://chriszabriskie.com/cylinders/) by Chris Zabriskie (http://chriszabriskie.com/); licensed under a Creative Commons Attribution license (https://creativecommons.org/licenses/by/4.0/) ► "Always Dreaming" by Caleb Etheridge, licensed through SoundStripe.com: https://app.soundstripe.com/songs/5534 ► Cylinder Two (http://chriszabriskie.com/cylinders/) by Chris Zabriskie (http://chriszabriskie.com/); licensed under a Creative Commons Attribution license (https://creativecommons.org/licenses/by/4.0/) ► "Fable" by Stephen Keech, licensed through SoundStripe.com: https://app.soundstripe.com/songs/6312 ► "Selha" by Stephen Keech, licensed through SoundStripe.com: https://app.soundstripe.com/songs/7102 Further reading and resources: ► Echeverria, F., Klinkhammer, G. & Thorne, K. S. (1991), "Billiard balls in wormhole spacetimes with closed timelike curves: Classical theory", Phys. Rev. D., 44, 1077: https://ui.adsabs.harvard.edu/abs/1991PhRvD..44.1077E/abstract ► S. Kalyana Rama & Siddhartha Sen (1994), "Inconsistent Physics in the Presence of Time Machines": https://arxiv.org/abs/gr-qc/9410031v1 ► Stephen Hawking (1992), "Chronology protection conjecture", Phys. Rev. D., 46, 603: https://ui.adsabs.harvard.edu/abs/1992PhRvD..46..603H/abstract ► Max Tegmark (1997), “On the dimensionality of space time”, CQG, 14, L69: https://arxiv.org/abs/gr-qc/9702052 Films clips used: ► The Assassination of Jesse James by the Coward Robert Ford (2007) Warner Bros ► Interstellar (2014) Paramount ► The Grey (2011) Open Road Films ► About Time (2013) Universal Pictures ► The Time Machine (2002) Dreamsworks Pictures ► Passengers (2016) Columbia Pictures ► Back to the Future (1985) Universal Pictures ► Avengers: Endgame (2018) Walt Disney Studios Motion Pictures ► Somewhere in Time (1980) Universal Pictures ► Lucy (2014) Universal Pictures ► The Matrix (1999) Warner Bros ► Immortal Beloved (1994) Columbia Pictures ► Prisoners (2013) Warner Bros ► X-Men: Days of Future Past (2014) 20th Century Fox ► Captain America: Civil War (2016) Walt Disney Studios Motion Pictures ► Inception (2010) Warner Bros ► Silver Linings Playbook (2012) The Weinstein Company ► The Dark Knight Rises (2012) Warner Bros ► Hidden Figures (2016) 20th Century Fox Television clips used: ► The Expanse (Legendary Television) ► Star Trek: The Next Generation (Paramount) ► Dr Who (BBC) ► Star Trek: Enterprise (Paramount) ► Game of Thrones (HBO) ► Genius (National Geographic) Other video clips used: ► ESO spacetime diagram https://www.spacetelescope.org/videos/heic1812b/ ► Earth orbit animation by Brad Freese: https://youtu.be/R2lP146KA5A ► Hefele Kating experiment video by Gideon Boulton: https://youtu.be/LW4NsxCglp4 ► SpaceX satellite launch: https://youtu.be/K_NFCeNrryg ► Wormhole animation by Robert Wilde: https://youtu.be/Fb4fpfPWL7k ::Playlists For Channel:: Latest Cool Worlds Videos ► http://bit.ly/NewCoolWorlds Cool Worlds Long Form Videos ► http://bit.ly/CoolWorldsEssays Cool Worlds Research ► http://bit.ly/CoolWorldsResearch Guest Videos ► http://bit.ly/CoolWorldsGuests Q&A Videos ► http://bit.ly/CoolWorldsQA Tabby's Star ► http://bit.ly/TabbysStar Science of TV/Film ► http://bit.ly/ScienceMovies ::Follow us:: SUBSCRIBE to the channel http://bit.ly/CoolWorldsSubscribe Cool Worlds Lab http://coolworlds.astro.columbia.edu Twitter https://twitter.com/david_kipping THANKS FOR WATCHING!! #TimeTravel #TimeMachine #CoolWorlds

If time travel to the future is theoretically possible... then how far ahead can we really go? In this video, Unveiled discovers what it would be like to time travel to the END OF TIME itself! What would you see? How would you feel? And would you live to tell the tale? The fate of the universe is one of the greatest mysteries there is... How will it all end? But you would have front row seats to the action... This is Unveiled, giving you incredible answers to extraordinary questions! Find more amazing videos for your curiosity here: What If the Big Bang Wasn't the Beginning? - https://www.youtube.com/watch?v=P6NK_GbfaXM What Are Black Holes Made Of? - https://www.youtube.com/watch?v=ekalyaatyb0 Are you constantly curious? Then subscribe for more from Unveiled ► https://goo.gl/GmtyPv #TimeTravel #Space #Universe #SpeedOfLight #Science #Physics #Amazing #Interesting

How was the speed of light first measured? Albert Einstein deduced it was the speed limit for everything in the universe. Is it possible to go faster? A lecture by Katherine Blundell OBE, Gresham Professor of Astronomy 02 October 2019 1PM BST https://www.gresham.ac.uk/lectures-and-events/faster-than-light The speed of light has fundamental significance.  This talk will explain how the speed of light was first measured, and how an obscure but brilliant patent clerk in Bern, Switzerland by the name of Albert Einstein deduced that the speed of light is the upper speed limit for everything in the Universe. It is even possible for things to be measured as travelling faster than the speed of light and I will explain how that is permissible and understandable in an Einsteinian worldview. #GreshamLectures #Astronomy #Lightspeed #Science #Space #Light #Universe

https://lt.org/ * What are the building blocks of our universe that everything is made of? In this video, ASTRID EICHHORN explains how her work seeks to reveal the fundamental microscopic structure of space-time. While recent pioneering experiments have confirmed aspects of Einstein’s General Theory of Relativity, this work seeks to overcome the limitations of current observational technology through theoretical investigations of the relationships between quantum space-time, quantum gravity and matter. With undoubted implications for our understanding of Dark Matter and the Standard Model of particle physics, the real-world applications of this kind of foundational research can have profound effects on all of our lives. Bio: Astrid Eichhorn was appointed associate professor at CP3-Origins at the University of Southern Denmark in 2019. Since 2016, she built up a research group at the Institute for Theoretical Physics at Heidelberg University as part of the DFG’s (Deutsche Forschungsgemeinschaft) Emmy Noether Programme. LT Video Publication DOI: https://doi.org/10.21036/LTPUB10642 https://www.thphys.uni-heidelberg.de/~eichhorn/

Time Travel has long been the holy grail for modern science... Some say we'll never be able to travel in time, while others believe we're close to achieving the impossible. But what if time travel already exists? If it's ever going to exist then surely it exists right now - right? In this video, Unveiled explores the paradox of time travel to unravel one of the greatest mysteries in the universe! This is Unveiled, giving you incredible answers to extraordinary questions! Find more amazing videos for your curiosity here: Is Time Travel Possible? - https://www.youtube.com/watch?v=LjOAE6FFVTo What If You Enter the Quantum Realm? - https://www.youtube.com/watch?v=UHKQn99Mp7Y Are you constantly curious? Are you a fiend for facts? Then subscribe for more from Unveiled ► https://goo.gl/GmtyPv #TimeTravel #Science #SciFi #DoctorWho

Thanks to LastPass for sponsoring PBS DS. You can check out LastPass by going to https://lastpass.onelink.me/HzaM/2019Q3JulyPBSspace Our universe started with the big bang. But only for the right definition of “our universe”. And of “started” for that matter. In fact, probably the Big Bang is nothing like what you were taught. A hundred years ago we discovered the beginning of the universe. Observations of the retreating galaxies by Edwin Hubble and Vesto Slipher, combined with Einstein’s then-brand-new general theory of relativity, revealed that our universe is expanding. And if we reverse that expansion far enough – mathematically, purely according to Einstein’s equations, it seems inevitable that all space and mass and energy should once have been compacted into an infinitesimally small point – a singularity. It’s often said that the universe started with this singularity, and the Big Bang is thought of as the explosive expansion that followed. And before the Big Bang singularity? Well, they say there was no “before”, because time and space simply didn’t exist. If you think you’ve managed to get your head around that bizarre notion then I have bad news. That picture is wrong. At least, according to pretty much every serious physicist who studies the subject. The good news is that the truth is way cooler, at least as far as we understand it. Check out the new Space Time Merch Store! https://pbsspacetime.com/ Support Space Time on Patreon https://www.patreon.com/pbsspacetime Hosted by Matt O'Dowd Written by Matt O'Dowd Graphics by Leonardo Scholzer Directed by Andrew Kornhaber Produced By: Kornhaber Brown Big Bang Supporters: Anton Lifshits David Nicklas Fabrice Eap Juan Benet Justin Lloyd Morgan Hough Quasar Supporters: Mark Heising Mark Rosenthal Tambe Barsbay Vinnie Falco Hypernova Supporters: Chuck Zegar Danton Spivey Donal Botkin Edmund Fokschaner Hank S John Hofmann John R. Slavik Jordan Young Joseph Salomone kkm Mark Heising Matthew Matthew O'Connor Syed Ansar Gamma Ray Burst Supporters: Adrien Hatch Alexey Eromenko Andreas Nautsch Bradley Jenkins Brandon Labonte Carlo Mogavero Daniel Lyons David Behtala DFaulk Dustan Jones Geoffrey Short James Flowers James Quintero John Funai John Pollock Jonah Jonathan Nesfeder Joseph Dillman Joseph Emison Josh Thomas Kevin Warne Kyle Hofer Malte Ubl Mark Vasile Nathan Hitchings Nick Virtue Paul Rose Ryan Jones Scott Gossett Sigurd Ruud Frivik Tim Jones Tim Stephani Tommy Mogensen Yurii Konovaliuk سلطان الخليفي

What If Stephen Hawking Had Unlimited Time? ► Subscribe: https://goo.gl/GmtyPv Professor Stephen Hawking was one of the most influential and inspiring scientists of his time. In this video, we explore Hawking's remarkable life, looking at the massive breakthroughs he made in science, his world-changing theories on everything from black holes to time travel, his tireless work to raise awareness for various charities, and his warnings about global warming, climate change and even the dangers of artificial intelligence. What if the great Stephen Hawking was given unlimited time? What do you think? Let us know in the comments, and tell us more questions you'd like us to explore! Find more mind bending videos to satisfy your curiosity here: Why the Multiverse Might be a Reality - https://www.youtube.com/watch?v=6jY7wtc5TQo What If the Speed of Light Slowed Down? - https://www.youtube.com/watch?v=ifj5Ctr8rT4 #StephenHawking #Hawking #BlackHole

Thanks to @AstroKatie (http://astrokatie.com, http://twitter.com/astrokatie) for the collaboration! Go to http://www.brilliant.org/minutephysics for free daily science puzzles Here's the original twitter thread https://twitter.com/astrokatie/status/1066526148149108736 Support MinutePhysics on Patreon! http://www.patreon.com/minutephysics Link to Patreon Supporters: http://www.minutephysics.com/supporters/ This video is about the cosmic distance scale and how we see objects farther away in space (ie at higher red shift) farther back in time because light takes time to reach us. Thus we can see not only stars and galaxies, but also the primordial stars & proto-galaxies, and even the remnants of the beginning of the universe itself: the CMB cosmic microwave background left over from the big bang. MinutePhysics is on twitter - @minutephysics And facebook - http://facebook.com/minutephysics Minute Physics provides an energetic and entertaining view of old and new problems in physics -- all in a minute! Created by Henry Reich

To support Kurzgesagt and learn more about Brilliant, go to https://www.brilliant.org/nutshell and sign up for free. The first 688 people that go to that link will get 20% off the annual Premium subscription. Are wormholes real or are they just magic disguised as physics and maths? And if they are real how do they work and where can we find them? Sources and further reading: https://authors.library.caltech.edu/9262/1/MORprl88.pdf http://www.cmp.caltech.edu/refael/league/thorne-morris.pdf Support us on Patreon so we can make more videos (and get cool stuff in return): https://www.patreon.com/Kurzgesagt?ty=h Steady: https://steadyhq.com/de/kurzgesagt Merchandise:  https://shop.kurzgesagt.org Newsletter: http://eepurl.com/cRUQxz Facebook: http://bit.ly/1NB6U5O Twitter: http://bit.ly/2DDeT83 Instagram: http://bit.ly/2DEN7r3 Discord: https://discord.gg/cB7ycdv The Voice of Kurzgesagt: Steve Taylor: http://voice-pool.com/en/english/ The music of the video here: Soundcloud: https://bit.ly/2B6EOnE Bandcamp: https://bit.ly/2MBHzyM Facebook: https://bit.ly/2GIoZlH THANKS A LOT TO OUR LOVELY PATRONS FOR SUPPORTING US: Big Skapinsky, Liam Wenzel, Juan Gonzalez, Grigory Sarnitsky, Brandon Cleary, Amanda Hutchings, Siddharth Amarsee, Maciamo Hay, Nick T., Gabriel Correa, Matthew McAteer, Javier Silva Calvo, javier canella, Gergely Szakács, Pernox, Alana leonhardy, Tommi Moilanen, David DiGiovanni, Jack Bernstein, Jonas Steen Nielsen, Thomas Pyke, Gizem Ozdemir, ShiroiYami, Alice Bater, Ennio Sialiti, Alexander Evans, Eric Chan, Peter Noort, Adrian Haslinger, Tomasz Różalski, Miro Cibula, Lyle Jeff, Sunil Pai, Aurélien Delaux, Piotr Pałek, Øyvind Helland, Khloudalahbaby, Nicola Larosa, Dave, Montant, Eli V, ryan oberfield, Iain Garioch, Janina Lamøy, Saurischian, Zachary Osman, Cody Douglas, Can Berk Güder, Jason Lin, Eric Lugo, Emil Hjort, Luuk Perdaems, Brandon Carraway, Zack Methven, dava, Gauthier Muguerza, Tim Andreev, Robin Gielings, Mihai Anei, Pranab Kumar Mishra, jeong-min, An, Nerijana, jongre1512, Mike Levy, David W., Jakob Stams, Linda Yancey, Leo White, John, Justin Boh, Thot, Matthew Dyet, Andrei Stefan, Patrick McKelvy, Kervan Govender, Rajiv Cruz, Peter Duncan, Ramsey Elbasheer, Zhuang Miao, Brayden Sola, frikinside, Yasmeen Mawlawi, Loic Rebillard, Nicholas Miller, Philipp Bergamin, K. Gustavo Carlos, Albin, Connor Wilson, Talal Al-Khaldi, NURO, Durham Goode, Christopher Hadley, Sean Holland, iulian constantin, Pumpk!nH34D, Douwe de Jong, Jens Baumann, Vladislav Aleynikov, Joshua Olson, Andrew Boggs, William Wu, Andrew Mckinley, Eric Burnett, Benjamin Bromberg, Barry Costa, Philippe Ryll, Barbieri Davide, Claire Baldauf, Ondrej Debreceni, Benjamin Sairanen, Elija Peterson, Eki Hassa, Ryan K. Allen, Ville Vuorela, Reinhold Dunkl, Gloria Hope, Matti Hanberg, Moritz Roell, Marco Schmidt, Trey, Jiesi Ren, Maurice Simmons, Simon Sardeson-Coe, Sam Day, Orphansmith, Noah T Blanchard, Gerald Balla, Yannick van Andel, Khaled I. Johari Help us caption & translate this video! https://www.youtube.com/timedtext_cs_panel?c=UCsXVk37bltHxD1rDPwtNM8Q&tab=2 Wormholes Explained – Breaking Spacetime

What if the future influences the past? It could, according to this new quantum theory. Special thanks to Dianna from Physics Girl for her help with this episode! If you haven’t yet, go check out her channel. She’s awesome. https://www.youtube.com/user/physicswoman This Is The Only Place Antimatter Can Survive In The Universe - https://youtu.be/XD8Q3Mb1Q4I Read More: Physicists provide support for retrocausal quantum theory, in which the future influences the past https://phys.org/news/2017-07-physicists-retrocausal-quantum-theory-future.html “Recently some physicists have been looking into this idea, called ‘retrocausality,’ because it can potentially resolve some long-standing puzzles in quantum physics.“ The Quantum Mechanics of Fate http://nautil.us/issue/9/time/the-quantum-mechanics-of-fate “Physicists as renowned as John Wheeler, Richard Feynman, Dennis Sciama, and Yakir Aharonov have speculated that causality is a two-headed arrow and the future might influence the past.” Scientists Finally Prove Strange Quantum Physics Idea Einstein Hated https://gizmodo.com/scientists-finally-prove-strange-quantum-physics-idea-e-1798433666 “That concept is also known as entanglement, and it’s what allows particles that have once interacted to share a connection regardless of the separation between them.” ____________________ Elements is more than just a science show. It’s your science-loving best friend, tasked with keeping you updated and interested on all the compelling, innovative and groundbreaking science happening all around us. Join our passionate hosts as they help break down and present fascinating science, from quarks to quantum theory and beyond. Seeker explains every aspect of our world through a lens of science, inspiring a new generation of curious minds who want to know how today’s discoveries in science, math, engineering and technology are impacting our lives, and shaping our future. Our stories parse meaning from the noise in a world of rapidly changing information. Visit the Seeker website https://www.seeker.com/videos Elements on Facebook - https://www.facebook.com/SeekerElements/ Subscribe now! http://www.youtube.com/subscription_center?add_user=dnewschannel Seeker on Twitter http://twitter.com/seeker Trace Dominguez on Twitter https://twitter.com/tracedominguez Seeker on Facebook https://www.facebook.com/SeekerMedia/ Seeker http://www.seeker.com/ This episode of Seeker was co-hosted by Trace Dominguez Written by: Victoria Barrios

In this week's QA, I wonder if we could use the speed of light to see ourselves in the past, how the Mars rovers clean their solar panels, and if aliens would infect us with their bacteria and viruses. Watch the Weekly Space Hangout: https://www.youtube.com/channel/UC0-KklSGlCiJDwOPdR2EUcg Sign up for my weekly email newsletter at: https://www.universetoday.com/newsletter What Fraser's Watching Playlist: https://www.youtube.com/playlist?list=PLbJ42wpShvmkjd428BcHcCEVWOjv7cJ1G Support us at: http://www.patreon.com/universetoday More stories at: http://www.universetoday.com/ Follow us on Twitter: @universetoday Like us on Facebook: https://www.facebook.com/universetoday Google+ - https://plus.google.com/+universetoday/ Instagram - http://instagram.com/universetoday Team: Fraser Cain - @fcain / [email protected] Karla Thompson - @karlaii / https://www.youtube.com/channel/UCEItkORQYd4Wf0TpgYI_1fw Chad Weber - [email protected] Chloe Cain - Instagram: @chloegwen2001 Balázs Suhajda Hi Fraser! We use massive cosmic bodies to bend light and magnify distant objects, soon using them to observe exoplanets and their atmospheres as they were long ago. I wonder if it could be possible to find rays of light that have left earth long ago and through the curvature of space end up returning to earth with high enough resolution to allow us to look back into the past. Is it completely out of the question? path finder discovery I want to know who dusts off the solor panels when it gets dusty an it probably does often due to those huge dust storms , hmmmmmm🤔??🙃🤓🤔🙄 ohh👽👾😱😨😍 Schnitzel Vonlichenmenutz Imagine the virus’s and bacteria they may unintentionally bring. Could potentially be the end of all life on earth. Also, I hope they have a good immune system for our planetary virus’s and bacteria Alpha Gusta I notice that in some space launches that the space craft immediately starts to spin into another direction, I know some course correction is needed for different orbital planes and trajectories. But sometimes it seems like they turn 90 degrees. Why dont they just build launch platforms in somewhat the correct direction? Phil Metal When the galaxies merge or slam together, would it be a slow event until things start smashing into each other? Or would some crazy gravity changes rip world's apart and it be a cataclysmic show? In your opinion would it be a galactic reset, would anything survive CODELESS Enjoy your videos and Q & A's : i was wondering, with this Mission of colonizing mars in the future, there are some ideas that the domes could have water in them to shield Radiation. How much water is needed to block radiation as in the thickness or width of water to block radiation. Thanks XXCoder I was wondering if it was possible to make "bed cylinders" that is partitioned into 2 sleeping areas. With some automatic counterbalancing for mass differences, it may be enough for sleeping in gravity for better health? Jim Labbe If super earths are more massive and have greater gravity wells, might that make space travel much more difficult for intelligent life? Put differently, if we could increase the mass of the earth at what point might it create a physical constraint on space travel? Captain Ultimate G'day from Down Under! I am a new subscriber and I am really enjoy your videos Fraser, so thanks for your knowledge and all your hard work. Would there be any point or benefit to launching a telescope into orbit around a planet in the outer solar system like neptune, or even pluto? Or are they too close in regards to current telescopes to really return any befit? Matthew Kramer Hello Fraser, quick question: How do you think our advances in Machine Learning, Reinforcement Learning and A.I in general will affect space missions in the near and distant future? Greetings Matthew Jesse Dyball Could you get two BFRs joined by long cables and have them spin? Peter Granzeier Do white dwarves have habitable zones?

An exploration of whether the Fermi Paradox is truly a paradox at all and an exploration of what time frames are involved in determining that. https://www.patreon.com/johnmichaelgodier Papers: "A Probabilistic Analysis of the Fermi Paradox", Evan Solomonides and Yervant Terzian, 2016 https://arxiv.org/abs/1604.07687 Music: Cylinder Five by Chris Zabriskie is licensed under a Creative Commons Attribution license (https://creativecommons.org/licenses/by/4.0/) Source: http://chriszabriskie.com/cylinders/ Artist: http://chriszabriskie.com/

Is String Theory the final solution for all of physic’s questions or an overhyped dead end? This video was realised with the help of Dr. Alessandro Sfondrini and it was funded by SNSF under Agora Grant n. 171622 and through the NCCR SwissMAP: The Mathematics of Physics. See also our video on the black-hole information paradox: https://bit.ly/2DU6p8P Support us on Patreon so we can make more videos (and get cool stuff in return): https://www.patreon.com/Kurzgesagt?ty=h Steady: https://steadyhq.com/de/kurzgesagt Merchandise:  https://shop.kurzgesagt.org Newsletter: http://eepurl.com/cRUQxz Facebook: http://bit.ly/1NB6U5O Twitter: http://bit.ly/2DDeT83 Instagram: http://bit.ly/2DEN7r3 Discord: https://discord.gg/cB7ycdv The Voice of Kurzgesagt: Steve Taylor: http://voice-pool.com/en/english/ The music of the video here: Soundcloud: http://bit.ly/2CsAbob Bandcamp: http://bit.ly/2oHsSPZ Facebook: http://bit.ly/2qW6bY4 THANKS A LOT TO OUR LOVELY PATRONS FOR SUPPORTING US: Flavio Storino, Alice Balcon, Hari Krishnan, Warren Wiscombe, Sara Zeglin, Asiryan Alexander, maarten sprengers, William Northern, Kerem Mimaroglu, Yana Kultysheva, Josh, Keaton Anderson, Croconaw, Peter Steinberger, Jonathan Diamond, Troy McConaghy, Paddy, Darko Sperac, Peter Burkhalter, Chris Amaris, Tyler Lovell, John Ruble, Chase Henson, Arpita Singh, Edward C.P., Andreas Edlund, Ryan Bubinski, Paul Greyson, Jerry Ding, Austin Sundquist, Daniel Link, Tim Johnson, kayleigh dreste, Johan Sjöblom, Max Stuart, Mush Rain, Andor Baranyi, Eduardas Afanasjevas, Bill Clem, Jake Smith, Stephen Woerner, Jeff Sorensen, Christopher Damsgaard, Eduardo AV, Michael Gawenka, Florian Hoedt, Lucas Nyman, Nathanael Baker, Martin Wierzyk, Mauricio Streb, Karl, Rameet Chawla, Joachim Andersen, Avinash, Erik Golden, Glenn Stoltz, Elliott Nelson, Andrew Averett, Ben Wei Help us caption & translate this video! http://www.youtube.com/timedtext_cs_p... String Theory Explained – What is The True Nature of Reality?

Go to http://brilliant.org/MinutePhysicsSpecialRelativity to learn more about spacetime diagrams and for 20% off a premium subscription to Brilliant. This video is chapter 2 in my series on special relativity, and it covers spacetime diagrams, rotational and translational symmetry of both time and space, how certain transformations preserve distances (measured in terms of a reference like a meter or second), and so on. We'll wait until the next video to talk about Lorentz transformations, relativity of velocity, minkowski diagrams, and the speed of light. Support MinutePhysics on Patreon! http://www.patreon.com/minutephysics Link to Patreon Supporters: http://www.minutephysics.com/supporters/ MinutePhysics is on twitter - @minutephysics And facebook - http://facebook.com/minutephysics And Google+ (does anyone use this any more?) - http://bit.ly/qzEwc6 Minute Physics provides an energetic and entertaining view of old and new problems in physics -- all in a minute! Created by Henry Reich

Einstein’s special theory of relativity is notorious for being easy to misuse, with the result that sometimes result in claims of paradoxes. When one digs more carefully into the theory, you find that no such paradoxes actually exist. In this video, Fermilab’s Dr. Don Lincoln describes a commonly claimed time dilation paradox and shows how to resolve it. Related videos: https://www.youtube.com/watch?v=qXxtqK7G4Uw https://www.youtube.com/watch?v=CB1QFUCga0I https://www.youtube.com/watch?v=Txv7V_nY2eg

Purpose of Disclaimer: The Disclaimer at the beginning of the video points out to the fact that all the time dilation values have been calculated using the logic mentioned in the disclaimer. The logic has been proposed by the creater of the video. However, he/she is not responsible if the actual time on these Space objects does not match with the values stated in the video. 😛 . . Time, as we know is relative. Depending upon your proximity to a massive object and your speed, time would move slower/faster for you as compared to an isolated observer who is at rest. The video tells us how much time passes on different objects in our Galaxy when one year passes on Earth. Is the difference significant or not? Watch the video to know more. Don't forget to Like, Subscribe and Comment. *Also turn on the notification bell for regular updates* Follow us on Instagram: https://www.instagram.com/astrogeekz/ We're on Facebook: https://www.facebook.com/astrogeekz/

Brian Greene moderates this fascinating program exploring the fundamental principles of Quantum Physics. Anyone with an interest in science will enjoy this thought-provoking and highly entertaining show. PARTICIPANTS: Mark Van Raamsdonk, Gerard ’t Hooft, David Wallace, Birgitta Whaley MODERATOR: Brian Greene WATCH THE TRAILER: https://youtu.be/JxhfU_fvlAM WATCH THE LIVE Q&A WITH MARK VAN RAAMSDONK: https://youtu.be/GvRNV6Gmmzk Ninety years after the historic double-slit experiment, the quantum revolution shows no sign of slowing. Join a vibrant conversation with renowned leaders in theoretical physics, quantum computation, and philosophical foundations, focused on how quantum physics continues to impact understanding on issues profound and practical, from the edge of black holes and the fibers of spacetime to teleportation and the future of computers. MORE INFO ABOUT THE PROGRAM AND PARTICIPANTS: https://www.worldsciencefestival.com/programs/computational-creativity/ This program is part of the Big Ideas Series, made possible with support from the John Templeton Foundation. - Subscribe to our YouTube Channel for all the latest from WSF - Visit our Website: http://www.worldsciencefestival.com/ - Like us on Facebook: https://www.facebook.com/worldsciencefestival/ - Follow us on Twitter: https://twitter.com/WorldSciFest TOPICS: - Brian Greene's introduction to Quantum Mechanics 00:09 - Participant Introductions 03:32 - Where do we currently stand with quantum mechanics? 05:30 - Chapter One - Quantum Basics 07:48 - The Double Slit experiment 14:18 - Chapter Two - Measurement and Entanglement 26:53 - Quantum Mechanics today is the best we have 41:27 - Chapter Three - Quantum Mechanics and Black Holes 59:07 - Black holes and Hawking Radiation 01:03:56 - Chapter Four - Quantum Mechanics and Spacetime 01:15:45 - Chapter Five - Applied Quantum 01:23:36 This program was recorded live on 6/2/17 and has been edited and condensed for our YouTube channel. Watch the original full livestream here: https://youtu.be/3qQ8r-_NdZo

Scientists may have found a way to make traversable wormholes a reality. How? Two black holes and some quantum entanglement. Quantum Teleportation Is Real, Here's How It Works - https://youtu.be/yb38jozeDOs Get 20% off http://www.domain.com domain names and web hosting when you use coupon code SEEKER at checkout! Read More: New Wormhole Could Resolve the Black Hole Information Paradox http://www.pbs.org/wgbh/nova/next/physics/new-wormhole-could-resolve-the-black-hole-information-paradox/ “What would happen if you fell into a black hole? For a long time, the only acceptable answer was that you would die. That is, unless a theoretical wormhole—a portal in spacetime between two black holes—were to save you.” Wormholes Might Burrow Through Black Hole Cores https://www.seeker.com/wormholes-might-burrow-through-black-hole-cores-1845995019.html “The weird physics of a black hole's singularity could turn our "classical" idea about black holes on its head. What if general relativity breaks down and the singularity isn't a singularity at all? What if we replace the singularity with a wormhole? Suddenly, instead of being the ultimate trash compactors of the universe, black holes become the ultimate sci-fi dream: they could be space-time transportation hubs.” The Oldest Black Hole Ever Found Is Almost as Old as the Universe Itself https://www.seeker.com/astrophysics/the-oldest-black-hole-ever-found-is-almost-as-old-as-the-universe-itself “A huge black hole has just been discovered that is about 13 billion light-years old – almost as old as the universe itself. The find of this supermassive black hole is puzzling astronomers because they can't figure out how this black hole was formed so early in the universe's history.” ____________________ Seeker inspires us to see the world through the lens of science and evokes a sense of curiosity, optimism and adventure. Visit the Seeker website https://www.seeker.com/videos Subscribe now! http://www.youtube.com/subscription_center?add_user=dnewschannel Seeker on Twitter http://twitter.com/seeker Trace Dominguez on Twitter https://twitter.com/tracedominguez Seeker on Facebook https://www.facebook.com/SeekerMedia/ Seeker http://www.seeker.com/ Special thanks to Athena Brensberger for writing and co-hosting this episode of Seeker! Check Athena out on Twitter: https://twitter.com/astroathens This episode of Seeker was co-hosted by Trace Dominguez

In this week's questions show, Fraser wonders where you'd have to go in the Universe to minimize your time dilation, how to see Iridium Flares, how interferometry works, and more. Subscribe to Fraser's weekly email newsletter: https://www.universetoday.com/newsletter What Fraser's Watching Playlist: https://www.youtube.com/playlist?list=PLbJ42wpShvmkjd428BcHcCEVWOjv7cJ1G Support us at: http://www.patreon.com/universetoday More stories at: http://www.universetoday.com/ Follow us on Twitter: @universetoday Like us on Facebook: https://www.facebook.com/universetoday Google+ - https://plus.google.com/+universetoday/ Instagram - http://instagram.com/universetoday Team: Fraser Cain - @fcain / [email protected] Karla Thompson - @karlaii / https://www.youtube.com/channel/UCEItkORQYd4Wf0TpgYI_1fw Chad Weber - [email protected] Chloe Cain - Instagram: @chloegwen2001

Brian Greene, professor of physics and mathematics at Columbia University and co-founder of the World Science Festival, explains what we know about time travel so far. Tech Insider tells you all you need to know about tech: gadgets, how-to's, gaming, science, digital culture, and more. Subscribe to our channel and visit us at: http://www.businessinsider.com/sai TI on Facebook: https://www.facebook.com/techinsider TI on Instagram: https://www.instagram.com/tech_insider/ TI on Twitter: https://twitter.com/techinsider -------------------------------------------------- Following is the transcript of the video: Brian Greene: I’m Brian Greene, professor of physics and mathematics at Columbia University and co-founder of the World Science Festival. It's critical that you realize that there are two types of time travel, and they are radically different. Time travel to the future? Definitely possible. We know how to do it because Einstein showed us the way over a hundred years ago. It’s surprising how few people actually really know about this in their bones. He showed that if you go out into space and travel near the speed of light, and you turn around, and you come back, your clock will be ticking off time more slowly. So, when you step off it's going to be the future on planet Earth. You will have time traveled into the future. He also showed that if you hang out near a nice strong source of gravity — a neutron star, a black hole — and you kind of get right near the edge of that object, time also for you would slow down real slow relative to everybody else. And therefore, when you come back to Earth, for instance, it'll again be far into the future. This is not controversial stuff. Any physicist who knows what they're talking about agrees with this. But the other kind of time travel — to the past is where the arguments start to happen because many of us don't think that time travel to the past is possible. The main proposal that people at least consider worthy of attention for traveling to the past does make use of a weird concept called wormholes. A wormhole is something that really … Albert Einstein again discovered. The guy has like got his name written over everything in this field. It's a bridge, if you will, from one location space to another. It's kind of a tunnel that gives you a shortcut to go from here to here. Now he discovered this in 1935 but it was subsequently realized that if you manipulate the openings of a wormhole — put one near a black hole or take one on a high-speed journey — then time of the two openings of this wormhole tunnel will not take off at the same rate, so that you will no longer just go from one location in space to another, if you go through this tunnel — through this wormhole — you'll go from one moment in time to a different moment in time. Go one way, you'll travel to the past, the other way, travel to the future. Now again, we don't know if wormholes are real. We don't know if they are real whether you'll be able to go through them. So, there are all sorts of uncertainties here. Most of us think that you're not going to actually go on a whirlwind journey through a wormhole to the past. But it's still not ruled out.

As of late I have seen many websites and videos claim that X points are essentially portals through space that humans can take advantage of. Some even go as far to say that X points have transported small space crafts through space-time. I am here today to tell you that all of this is false, but the truth behind X points may be cooler than the embellished stories. Follow Me: https://twitter.com/CatechismYT Feel Free to Donate: https://www.patreon.com/Catechism If you enjoyed the video please hit that like button. Also, remember to subscribe for more videos just like this one. Sources: https://www.nasa.gov/mission_pages/sunearth/news/mag-portals.html https://www2.warwick.ac.uk/fac/sci/physics/research/cfsa/people/valery/teaching/px420/handouts/mr1.pdf https://mms.gsfc.nasa.gov/science.html https://www.uu.edu/dept/physics/scienceguys/2004Sept.cfm http://thecanadianinstituteforappliedastronomy.yolasite.com/flux-transfer-event--interplanetary.php https://en.wikipedia.org/wiki/Flux_transfer_event https://en.wikipedia.org/wiki/Magnetic_reconnection Background Music: https://www.youtube.com/watch?v=6Sq5Y2HzF1c&t=41s Images: https://www.nasa.gov/sites/default/files/styles/ubernode_alt_horiz/public/mag-recon-graphic_0.jpg - NASA https://www.nasa.gov/sites/default/files/polar-xpoint.jpg - NASA https://3c1703fe8d.site.internapcdn.net/newman/gfx/news/hires/2013/asolarmagnet.jpg - Phys.org https://commons.wikimedia.org/wiki/File:Earths_Magnetic_Field_Confusion.svg https://commons.wikimedia.org/wiki/File:Earth_layers_model.png https://commons.wikimedia.org/wiki/File:Astronaut_animated_1.png https://3c1703fe8d.site.internapcdn.net/newman/gfx/news/hires/2016/whyweshouldw.jpg https://www.jpl.nasa.gov/images/cassini/20150126/pia19055-16.jpg http://trithucvn.net/khoa-hoc/chung-dang-song-cac-cong-trinh-cu-thach-khong-chi-la-da.html https://alienpolicy.com/nasa-discovered-proof-of-portals-and-has-just-sent-four-spacecrafts-to-test-them/ Videos: 4K Galaxy Space Star Travel Zoom in Animation UHD HD Backgroundby أحمد الحسيني https://www.facebook.com/Gaia/videos/1725937790770238/?hc_ref=ARQJijqZnNG0_xwDSe49JmamGxOX6nfc5iVZ0zJ2FNbtsC4oRXpeIXznuG310kb1Nwc&pnref=story

On set right now shooting for a baby bag company! 👶🏼 Haha in the meantime let's chat about Einstein's theory of general relativity! I just wanted to lay down a basis for this before jumping into gravitational waves and field theory! Which I REALLY wanna talk about!

Support the show: http://www.patreon.com/pmsutter All episodes: http://www.AskASpaceman.com Follow on Twitter: http://www.twitter.com/PaulMattSutter Like on Facebook: http://www.facebook.com/PaulMattSutter Watch on YouTube: http://www.youtube.com/c/PaulMattSutter What’s the deal with time crystals? Do they break physics as we know it? Or are they merely…neat? What do symmetries and the conservation of energy have to do with it? I discuss these questions and more in today’s Ask a Spaceman! Keep those questions about space, science, astronomy, astrophysics, physics, and cosmology coming to #AskASpaceman for COMPLETE KNOWLEDGE OF TIME AND SPACE! Big thanks to my top Patreon supporters this month: Justin G., Kevin O., Justin R., Helge B., Tim R., Michael C., Lars H., Ray S., John F., James L., Mark R., Alan M., David B., and Silvan W.! Music by Jason Grady and Nick Bain. Thanks to WCBE Radio for hosting the recording session, Greg Mobius for producing, and Cathy Rinella for editing. Hosted by Paul M. Sutter, astrophysicist at The Ohio State University, Chief Scientist at COSI Science Center, and the one and only Agent to the Stars (http://www.pmsutter.com).

Support the show: http://www.patreon.com/pmsutter All episodes: http://www.AskASpaceman.com Follow on Twitter: http://www.twitter.com/PaulMattSutter Like on Facebook: http://www.facebook.com/PaulMattSutter Watch on YouTube: http://www.youtube.com/c/PaulMattSutter What’s the deal with time crystals? Do they break physics as we know it? Or are they merely…neat? What do symmetries and the conservation of energy have to do with it? I discuss these questions and more in today’s Ask a Spaceman! Support the show: http://www.patreon.com/pmsutter All episodes: http://www.AskASpaceman.com Follow on Twitter: http://www.twitter.com/PaulMattSutter Like on Facebook: http://www.facebook.com/PaulMattSutter Watch on YouTube: http://www.youtube.com/c/PaulMattSutter Keep those questions about space, science, astronomy, astrophysics, physics, and cosmology coming to #AskASpaceman for COMPLETE KNOWLEDGE OF TIME AND SPACE! Big thanks to my top Patreon supporters this month: Justin G., Kevin O., Justin R., Helge B., Tim R., Michael C., Lars H., Ray S., John F., James L., Mark R., Alan M., David B., and Silvan W.! Music by Jason Grady and Nick Bain. Thanks to WCBE Radio for hosting the recording session, Greg Mobius for producing, and Cathy Rinella for editing. Hosted by Paul M. Sutter, astrophysicist at The Ohio State University, Chief Scientist at COSI Science Center, and the one and only Agent to the Stars (http://www.pmsutter.com).

A collaboration with Jorge Cham and Daniel Whiteson, check out "We Have No Idea" at http://www.wehavenoidea.com Jorge's PhDComics: http://www.phdcomics.com Numberphile video about sports in hyperbolic space: https://www.youtube.com/watch?v=u6Got0X41pY Support MinutePhysics on Patreon! http://www.patreon.com/minutephysics Link to Patreon Supporters: http://www.minutephysics.com/supporters/ MinutePhysics is on twitter - @minutephysics And facebook - http://facebook.com/minutephysics And Google+ (does anyone use this any more?) - http://bit.ly/qzEwc6 This video is about the local and global geometry and curvature of space and spacetime, aka, is space flat? Negatively curved? Positively curved? etc. Minute Physics provides an energetic and entertaining view of old and new problems in physics -- all in a minute! Created by Henry Reich

Identical Universe Where Time Flows Backwards. Theoretical physicists are now proposing there is an inverse universe where time appears to move backwards not forwards. This universe is said to be an exact copy of ours. So instead of moving from prehistoric history to the digital age, this universe is experiencing the digital age first and progressing towards prehistoric history. Watch the video to learn more. Is this inverse mirror universe possible? Tell us in the comments. If you enjoyed the video please hit that like button. Also, remember to subscribe for more videos just like this one. Follow Me: https://twitter.com/CatechismYT Feel Free to Donate: https://www.patreon.com/Catechism Background Music: Composer - Jake LaVallee, Owner of http://uncopyrightedmusic.net

Fasten your interstellar seatbelt and flip your brain into overdrive. Neil deGrasse Tyson and comic co-host Godfrey are here to answer fan-submitted Cosmic Queries on the fabric of spacetime. Explore the edge of the known universe and whether there might be more unknown universe waiting beyond the horizon. You’ll hear about the fascinating theory describing our universe as a 3-D holographic projection of another higher-dimensioned reality. You’ll hear why dark matter could be “gravitational bleeding” from another dimension and how it’s possible that the study of dark matter and dark energy will unlock the secrets to traveling backwards in time. Investigate the connections between dark matter, Newtonian physics, and Occam’s razor. Neil also explains why the curvature of space is hard for us to see given that we are embedded in space itself. Find out about the Fermi paradox and the idea that extraterrestrial life might have already visited Earth and deemed life unintelligent. Discover more about Sir Isaac Newton: the problems Neil would ask him to solve today, how he invented calculus on a dare, and why Godfrey thinks he might be annoying to talk to in the modern era. All this, plus, a fan asks Neil, “How many physicists does it take to change a light bulb?” and his response is something you will not want to miss.

In this week’s Q&A, Fraser talks about black holes consuming dark matter, if traveling faster than light moves you backwards in time, and what those big pools under rockets are for. Support us at: http://www.patreon.com/universetoday More stories at: http://www.universetoday.com/ Follow us on Twitter: @universetoday Like us on Facebook: https://www.facebook.com/universetoday Google+ - https://plus.google.com/+universetoday/ Instagram - http://instagram.com/universetoday Team: Fraser Cain - @fcain / [email protected] Karla Thompson - @karlaii / https://www.youtube.com/channel/UCEIt... Chad Weber - [email protected] Chloe Cain

Scientists have a few theories. Learn more about this story at www.newsy.com/70096/ Find more videos like this at www.newsy.com Follow Newsy on Facebook: www.facebook.com/newsyvideos Follow Newsy on Twitter: www.twitter.com/newsyvideos

Viewers like you help make PBS (Thank you 😃) . Support your local PBS Member Station here: https://to.pbs.org/DonateSPACE Paul Dirac’s insights into the nature of Quantum Mechanics laid the foundation for Quantum Field Theory and predicted the existence of anti-matter. Part 1 in our series on Quantum Field Theory. Try Skillshare at http://skl.sh/spacetime You can further support us on Patreon at https://www.patreon.com/pbsspacetime Get your own Space Time t­shirt at http://bit.ly/1QlzoBi Tweet at us! @pbsspacetime Facebook: facebook.com/pbsspacetime Email us! pbsspacetime [at] gmail [dot] com Comment on Reddit: http://www.reddit.com/r/pbsspacetime Help translate our videos! https://www.youtube.com/timedtext_cs_panel?tab=2&c=UC7_gcs09iThXybpVgjHZ_7g Review our quantum mechanics playlist: http://bit.ly/2rWTYSO Book recommendations: The Quantum Divide, by Christopher Gerry & Kimberley Bruno The Character of Physical Law, by Richard Feynman Previous Episode: Supervoids vs Colliding Universes https://www.youtube.com/watch?v=lrS0rxX-UhA It’s 1928. Over the past quarter century, the greatest geniuses of the modern era discovered the two keys to the fundamental nature of reality. Einstein’s theories of special and general relativity had changed forever the way we think of motion, space, and time. And the emerging field of quantum mechanics had radically altered our understanding of the fundamental building blocks of the universe. Yet this year one brilliant insight would bring these theories together and unveil the quantum fabric of reality. It would also predict the existence of antimatter. Written and Hosted by Matt O’Dowd Produced by Rusty Ward Graphics by Kurt Ross Made by Kornhaber Brown (www.kornhaberbrown.com) Comments answered by Matt: Sourcedrop https://www.youtube.com/watch?v=lrS0rxX-UhA&lc=z12fglgxiqyuzroqx04cjly40pboiddbqt40k Vhsjpdfg https://www.youtube.com/watch?v=lrS0rxX-UhA&lc=z13jylhxnpqzwjt5s04cehcilubxjvaoqp40k Galdo145 https://www.youtube.com/watch?v=lrS0rxX-UhA&lc=z135j5141pmhv1yop04cfdcjmojfgnbqznw0k Pradhyumn https://www.youtube.com/watch?v=lrS0rxX-UhA&lc=z122hjuyfybrxpr3a22vctvxhkeahfmwq04 Special thanks to our Patreon Big Bang, Quasar and Hypernova Supporters: Big Bang Shane Robinson David Nicklas Eugene Lawson Quasar Tambe Barsbay Coolascats Max Levine Hypernova Chuck Zegar Jordan Young Ratfeast John Hofmann Joseph Salomone Martha Hunt Craig Peterson Prof. Dr. Kenneth Michael Beck Science Via Markets Thanks to our Patreon Gamma Ray Burst Supporters: Alex Seto Conor Dillon Jared Moore Michal-Peanut Karmi Bernardo Higuera Erik Stein Daniel Lyons Jade Bilkey Kevin Warne JJ Bagnell J Rejc Amy Jie Avi Goldfinger John Pettit Shannan Catalano Florian Stinglmayr Yubo Du Benoit Pagé-Guitard Ronny Polonia Nathan Leniz Jessica Fraley Loro Lukic Brandon Labonte David Crane Greg Weiss Eric Jackson

If you're a fan of science fiction, you may already know about wormholes: a hypothetical connection between widely separated regions of space-time. This passageway could create shortcuts for long journeys across the universe... but how is one made? On this episode of Through The Wormhole physicists explain the science behind black holes and wormholes to decide whether or not it would be possible to time travel. Subscribe to us here: https://www.youtube.com/user/yourdiscoveryscience?sub_confirmation=1 Like us at: https://www.Facebook.com/yourdiscoveryscience

Support ASTRONOMIC: https://www.patreon.com/Astronomic PayPal Donations: [email protected] Subscribe to ASTRONOMIC: https://www.youtube.com/astronomic1 Twitter: https://www.twitter.com/astronomic1 Instagram: https://www.instragram.com/astronomic1 Facebook: https://www.facebook.com/astronomicbook Exclusive Content: https://www.curious.com/astronomic Hello Everyone! Welcome to OUR Universe! If you've enjoyed the video... click the LIKE button! If you want to support the channel... click the SUBSCRIBE button! TITLE: Light Is A Time Machine! LINKS: 1. Space.com http://www.space.com/15830-light-speed.html 2. UCSD http://casswww.ucsd.edu/archive/public/tutorial/Intro.html 3. UCR http://math.ucr.edu/home/baez/physics/Relativity/SpeedOfLight/measure_c.html OTHER VIDEOS: 1. How Does The Sun Produce Energy? https://www.youtube.com/watch?v=hL2PbAy99wE 2. The Origins Of Gravity https://www.youtube.com/watch?v=ZO6KanqaACc 3. How BIG Is The Milky Way? https://www.youtube.com/watch?v=5XTx1Qer9tk Thanks for Watching! Twitter: https://www.twitter.com/astronomic1 Instagram: https://www.instragram.com/astronomic1 Facebook: https://www.facebook.com/astronomicbook Exclusive Content: https://www.curious.com/astronomic Support ASTRONOMIC: https://www.patreon.com/Astronomic PayPal Donations: [email protected] to ASTRONOMIC: https://www.youtube.com/astronomic1

Viewers like you help make PBS (Thank you 😃) . Support your local PBS Member Station here: https://to.pbs.org/DonateSPACE Using geometry we can not only understand, but visualize how causality dictates the order of events in our universe. Start your Audible trial today at http://www.audible.com/spacetime You can further support us on Patreon at https://www.patreon.com/pbsspacetime Get your own Space Time t­shirt at http://bit.ly/1QlzoBi Tweet at us! @pbsspacetime Facebook: facebook.com/pbsspacetime Email us! pbsspacetime [at] gmail [dot] com Comment on Reddit: http://www.reddit.com/r/pbsspacetime Help translate our videos! https://www.youtube.com/timedtext_cs_panel?tab=2&c=UC7_gcs09iThXybpVgjHZ_7g In this episode we dive deeper into the relationship between space and time and explore how we can geometrically map the causality of the universe and increase our understanding of how time and distance relate to one another. Important Reference Episodes: The Speed of Light is not about Light (1:16) https://www.youtube.com/watch?v=msVuCEs8Ydo Can You Trust Your Eyes in Space Time? (1:16) https://www.youtube.com/watch?v=P4rW_pPbD-U Previous Episode: Why Quasars are so Awesome https://www.youtube.com/watch?v=3TZEp_n3eIc&t=63s Written and hosted by Matt O’Dowd Produced by Rusty Ward Graphics by Grayson Blackmon Made by Kornhaber Brown (www.kornhaberbrown.com) Comments Answered by Matt: Michael Lloyd https://www.youtube.com/watch?v=-q7EvLhOK08&lc=z135yvabnnr2t1cfv22azxuyiwmux5xai04 Jose Hernandez https://www.youtube.com/watch?v=-q7EvLhOK08&lc=z13zzv5wmvrhe5hpn04chzwbnoznthg4j1w Joan Eunice https://www.youtube.com/watch?v=3TZEp_n3eIc&lc=z13ncrdwnpj0wfplk23exlqwqnauvkpc Mike Cammiso https://www.youtube.com/watch?v=3TZEp_n3eIc&lc=z13fxdlopsylwh5f122rh3oycpyxjr1pn04 Bikram Sao https://www.youtube.com/watch?v=3TZEp_n3eIc&lc=z12uytbouwb0t3pym04cg3szjmqyeffzvlo0k Cinestar Productions https://www.youtube.com/watch?v=3TZEp_n3eIc&lc=z121zlv51n3ls5m5b04cjpjwcpavu5xok3s Special thanks to our Patreon Big Bang, Quasar and Hypernova Supporters: Big Bang Henry Van Styn David Nicklas Quasar Jelle Slaets Tambe Barsbay Joel Brinton Luna IT Solutions Hypernova Joe Chuck Zegar Craig Peterson Jordan Young Ratfeast John Hofmann Thanks to our Patreon Gamma Ray Burst Supporters: Bernardo Higuera Erik Stein Daniel Lyons Avan & Kyan Griggs Bernardo Higuera Jade Bilkey Kevin Warne JJ Bagnell J Rejc Michael Fischer Dylan Merida Amy Jie Anthony Caridi Avi Goldfinger Corey Smeaton John Pettit Shannan Catalano Florian Stinglmayr Yubo Du Benoit Pagé-Guitard Ronny Polonia Nathan Leniz Jessica Fraley Kirk Mathews Loro Lukic Carl P. Corliss Brandon labonte David Crane Greg Weiss Eric Jackson Will and Sonja Marple

Full podcast episodes: http://www.askaspaceman.com Support: http://www.patreon.com/pmsutter Follow: http://www.twitter.com/PaulMattSutter and http://www.facebook.com/PaulMattSutter Are wormholes real or what? How did we even start thinking of them? If we could build one, would it be possible to actually, you know, use it? I discuss these questions and more in today’s Ask a Spaceman! Support the show: http://www.patreon.com/pmsutter All episodes: http://www.AskASpaceman.com Follow on Twitter: http://www.twitter.com/PaulMattSutter Like on Facebook: http://www.facebook.com/PaulMattSutter Watch on YouTube: http://www.youtube.com/c/PaulMattSutter Keep those questions about space, science, astronomy, astrophysics, physics, and cosmology coming to #AskASpaceman for COMPLETE KNOWLEDGE OF TIME AND SPACE! Big thanks to my top Patreon supporters this month: Mathieu B., Justin G., Jerry, Tim F., Helge B., Alan M., Tim R., Ray S., Michael C., Bill S., Lars H., David C., Silvan W., David B., Kevin O., and Justin R.! Music by Jason Grady and Nick Bain. Thanks to WCBE Radio for hosting the recording session and Cathy Rinella for editing. Hosted by Paul M. Sutter, who is a legit scientist (http://www.pmsutter.com)

There’s one interpretation of the meaning of quantum mechanics that manages to skip a lot of the unphysical weirdness of the mainstream interpretations: it's de Broglie-Bohm pilot wave theory. Help us continue making this show by contributing here: https://www.patreon.com/pbsspacetime Get your own Space Time t­shirt at http://bit.ly/1QlzoBi Tweet at us! @pbsspacetime Facebook: facebook.com/pbsspacetime Email us! pbsspacetime [at] gmail [dot] com Comment on Reddit: http://www.reddit.com/r/pbsspacetime Help tranlate our videos! https://www.youtube.com/timedtext_cs_panel?tab=2&c=UC7_gcs09iThXybpVgjHZ_7g There are some pretty out-there explanations for the processes at work behind the incredibly successful mathematics of quantum mechanics - things are both waves and particles at the same time, the act of observation defines reality, cats are alive and dead, or even: the universe is constantly splitting into infinite alternate realities. The weird results of quantum experiments seem to demand weird explanations of the nature of reality. In this episode, Matt discusses de Broglie-Bohm pilot wave theory, the one interpretation of quantum mechanics that remains comfortably, stodgily physical. Links to Sources The Quantum Experiment that Broke Reality https://www.youtube.com/watch?v=p-MNSLsjjdo&t=53s The Many Worlds of the Quantum Multiverse https://www.youtube.com/watch?v=dzKWfw68M5U&t=690s Is This What Quantum Mechanics Looks Like? https://www.youtube.com/watch?v=WIyTZDHuarQ A Suggested Interpretation of the Quantum Theory in Terms of "Hidden" Variables. I: David Bohm, 1952, Phys. Rev. 85, 166 http://journals.aps.org/pr/abstract/10.1103/PhysRev.85.166 Bohms original paper is behind the journal paywall (sorry!), however many other readings on Bohmian mechanics are available here: http://www.bohmian-mechanics.net/readings_books.html Previous Space Time Episode https://www.youtube.com/watch?v=u4RNGRyzt10 Written and hosted by Matt O’Dowd Produced by Rusty Ward Made by Kornhaber Brown (www.kornhaberbrown.com) Comments Answered by Matt Burak Bağdatlı https://www.youtube.com/watch?v=u4RNGRyzt10&lc=z13hvpcjrlndslnyb04cctjqrvb4hpkphe4 Sebastián López https://www.youtube.com/watch?v=u4RNGRyzt10&lc=z124yxrjyw3ywvicm23wspagcxracphvg The757packerfan https://www.youtube.com/watch?v=u4RNGRyzt10&lc=z13ujbnznvmfjnhag04cgtprtriafnj4t2k Special thanks to our Patreon Hypernova and Quasar Supporters: Joel Brinton Antonio Park Alastair Taft Clock Watcher Joe John Hofmann Thanks to our Patreon Gamma Ray Burst Supporters: Jade Bilkey Kevin Warne JJ Bagnell J Rejc Bernardo Higuera Michael Fischer Dylan Merida Colette Weeks Amy Jie Anthony Caridi Avi Goldfinger Corey Smeaton John Pettit Shannan Catalano Florian Stinglmayr Yubo Du Benoit Pagé-Guitard Ronny Polonia Nathan Leniz Jessica Fraley Kirk Mathews Loro Lukic Carl P. Corliss Brandon labonte David Crane Greg Weiss David Matteson Marc Lagarde Eric Jackson Will and Sonja Marple

Support ASTRONOMIC: https://www.patreon.com/Astronomic PayPal Donations: [email protected] Subscribe to ASTRONOMIC: https://www.youtube.com/astronomic1 Twitter: https://www.twitter.com/astronomic1 Instagram: https://www.instragram.com/astronomic1 Facebook: https://www.facebook.com/astronomicbook Exclusive Content: https://www.curious.com/astronomic CAN BLACK HOLES STOP TIME?! Hello Everyone! Welcome to OUR Universe! If you've enjoyed the video... click the LIKE button! If you want to support the channel... click the SUBSCRIBE button! LINKS: 1. Wiki: https://en.wikipedia.org/wiki/Black_hole 2. Cornell University Library: https://arxiv.org/abs/0709.1722 3. HubbleSite: http://hubblesite.org/reference_desk/faq/answer.php.id=62&cat=exotic OUTRO: 1. WHAT IS... A BLACK HOLE? https://www.youtube.com/watch?v=Jn3AjzyxCQc 2. WHERE DID THE BIG BANG HAPPEN? https://www.youtube.com/watch?v=NDMlwcBnXEA 3. GALACTIC EVOLUTION https://www.youtube.com/watch?v=1d3wMsp_cfQ Thanks for Watching! Twitter: https://www.twitter.com/astronomic1 Instagram: https://www.instragram.com/astronomic1 Facebook: https://www.facebook.com/astronomicbook Exclusive Content: https://www.curious.com/astronomic Support ASTRONOMIC: https://www.patreon.com/Astronomic PayPal Donations: [email protected] to ASTRONOMIC: https://www.youtube.com/astronomic1

Is our universe a definitive single reality or is it merely one within an infinitely branching multiverse? Be sure to check out Physics Girl’s Dianna Cowern for more awesome science https://www.youtube.com/c/physicsgirl Get your own Space Time t­shirt at http://bit.ly/1QlzoBi Tweet at us! @pbsspacetime Facebook: facebook.com/pbsspacetime Email us! pbsspacetime [at] gmail [dot] com Comment on Reddit: http://www.reddit.com/r/pbsspacetime Support us on Patreon! http://www.patreon.com/pbsspacetime Help translate our videos! http://www.youtube.com/timedtext_cs_panel?tab=2&c=UC7_gcs09iThXybpVgjHZ_7g The Copenhagen interpretation of quantum mechanics tells us that observation collapses a probability wave into a single definitive outcome, but this isn’t the only interpretation of quantum mechanics. The many worlds theory proposes that the wavefunction never actually collapses. The observer simply follows one of those many possible paths into their present reality while all the other paths continue on independent of the observer. Each of these paths branches off into an entirely different reality. In this episode Matt discusses the details of the many worlds theory and why it’s not so far-fetched to think that our reality is simply one of an infinite number of realities existing within space time. Links to sources: The Quantum Experiment that Broke Reality https://www.youtube.com/watch?v=p-MNSLsjjdo Hugh Everett's Ph.D. Dissertation http://www-tc.pbs.org/wgbh/nova/manyworlds/pdf/dissertation.pdf Crazy Pool Vortex https://www.youtube.com/watch?v=pnbJEg9r1o8 Previous Episode https://www.youtube.com/watch?v=jowVq81AgGw Written and hosted by Matt O’Dowd Produced by Rusty Ward Made by Kornhaber Brown (www.kornhaberbrown.com)

Primordial black holes may be lurking throughout our universe. How large are they, how many are out there and what would happen if they moved through our solar system? To learn more about black holes, gravity and so much more check out The Great Courses Plus by going to http://ow.ly/JqPz30491TL Get your own Space Time t­shirt at http://bit.ly/1QlzoBi Tweet at us! @pbsspacetime Facebook: facebook.com/pbsspacetime Email us! pbsspacetime [at] gmail [dot] com Comment on Reddit: http://www.reddit.com/r/pbsspacetime Support us on Patreon! http://www.patreon.com/pbsspacetime Help translate our videos! http://www.youtube.com/timedtext_cs_panel?tab=2&c=UC7_gcs09iThXybpVgjHZ_7g Scientists believe that many black holes may have been created at the time of the Big Bang and and are still roaming our universe today. If we found them they would tell us a great deal about the origins of the cosmos. Previous Episode https://www.youtube.com/watch?v=BAoEnV3Zt_Q How to Build a Black Hole https://www.youtube.com/watch?v=xx4562gesw0 Do Events Inside Black Holes Happen? https://www.youtube.com/watch?v=vNaEBbFbvcY Written and hosted by Matt O’Dowd Produced by Rusty Ward Made by Kornhaber Brown (www.kornhaberbrown.com) Comments answered by Matt: Parameth Ratnasakha https://www.youtube.com/channel/UCgJt6aIeNjKjG5lD9OH75Eg Turcan Fred https://www.youtube.com/channel/UC_gBta_f1xA4bPsdWVoMerg Leonidas Pereira https://www.youtube.com/channel/UC5JxQoYgHYrfttfKipfP5rQ ZombieWelder https://www.youtube.com/channel/UCKsvZzjVBZ5PVhvhU4vMAbg Goodsire https://www.youtube.com/user/joshyman221 Arduenn Schwartzman https://www.youtube.com/user/arduenn

Black holes are the most impressive objects in the Universe, but when happens when they crash into each other is absolutely mind-bending. They distort space and time itself, sending ripples out into the Universe. Support us at: http://www.patreon.com/universetoday More stories at: http://www.universetoday.com/ Follow us on Twitter: @universetoday Follow us on Tumblr: http://universetoday.tumblr.com/ Like us on Facebook: https://www.facebook.com/universetoday Google+ - https://plus.google.com/+universetoday/ Instagram - http://instagram.com/universetoday Team: Fraser Cain - @fcain / [email protected] Jason Harmer - @jasoncharmer Chad Weber - [email protected] Created by: Fraser Cain and Jason Harmer Edited by: Chad Weber Music: Left Spine Down - “X-Ray” https://www.youtube.com/watch?v=4tcoZNrSveE The sign of a truly great scientific theory is by the outcomes it predicts when you run experiments or perform observations. And one of the greatest theories ever proposed was the concept of Relativity, described by Albert Einstein in the beginning of the 20th century. In addition to helping us understand that light is the ultimate speed limit of the Universe, Einstein described gravity itself as a warping of spacetime. He did more than just provide a bunch of elaborate new explanations for the Universe, he proposed a series of tests that could be done to find out if his theories were correct. One test, for example, completely explained why Mercury’s orbit didn’t match the predictions made by Einstein. Other predictions could be tested with the scientific instruments of the day, like measuring time dilation with fast moving clocks. Since gravity is actually a distortion of spacetime, Einstein predicted that massive objects moving through spacetime should generate ripples, like waves moving through the ocean. Just by walking around, you leave a wake of gravitational waves that compress and expand space around you. However, these waves are incredibly tiny. Only the most energetic events in the entire Universe can produce waves we can detect. It took over 100 years to finally be proven true, the direct detection of gravitational waves. In February, 2016, physicists with the Laser Interferometer Gravitational Wave Observatory, or LIGO announced the collision of two massive black holes more than a billion light-years away. Any size of black hole can collide. Plain old stellar mass black holes or supermassive black holes. Same process, just on a completely different scale. Let’s start with the stellar mass black holes. These, of course, form when a star with many times the mass of our Sun dies in a supernova. Just like regular stars, these massive stars can be in binary systems. Imagine a stellar nebula where a pair of binary stars form. But unlike the Sun, each of these are monsters with many times the mass of the Sun, putting out thousands of times as much energy. The two stars will orbit one another for just a few million years, and then one will detonate as a supernova. Now you’ll have a massive star orbiting a black hole. And then the second star explodes, and now you have two black holes orbiting around each other. As the black holes zip around one another, they radiate gravitational waves which causes their orbit to decay. This is kind of mind-bending, actually. The black holes convert their momentum into gravitational waves. As their angular momentum decreases, they spiral inward until they actually collide. What should be one of the most energetic explosions in the known Universe is completely dark and silent, because nothing can escape a black hole. No radiation, no light, no particles, no screams, nothing. And if you mash two black holes together, you just get a more massive black hole. The gravitational waves ripple out from this momentous collision like waves through the ocean, and it’s detectable across more than a billion light-years. This is exactly what happened earlier this year with the announcement from LIGO. This sensitive instrument detected the gravitational waves generated when two black holes with 30 solar masses collided about 1.3 billion light-years away. This wasn’t a one-time event either, they detected another collision with two other stellar mass black holes. Regular stellar mass black holes aren’t the only ones that can collide. Supermassive black holes can collide too. From what we can tell, there’s a supermassive black hole at the heart of pretty much every galaxy in the Universe. The one in the Milky Way is more than 4.1 million times the mass of the Sun, and the one at the heart of Andromeda is thought to be 110 to 230 million times the mass of the Sun. In a few billion years, the Milky Way and Andromeda are going to collide, and begin the process of merging together. Unless the Milky Way’s black hole gets kicked off into deep space, the two black holes are going to end up orbiting one another.

For those of you in New York City you can check out Matt live at PBS Nerd Night at the NYC YouTube Space on Thursday night September 22nd. Hope to see you there. to.pbs.org/nerdnight Albert Einstein strongly disagreed with Niels Bohr when it came to Bohr’s interpretation of quantum mechanics. Quantum entanglement settled the argument once and for all. Get your own Space Time t­shirt at http://bit.ly/1QlzoBi Tweet at us! @pbsspacetime Facebook: facebook.com/pbsspacetime Email us! pbsspacetime [at] gmail [dot] com Comment on Reddit: http://www.reddit.com/r/pbsspacetime Support us on Patreon! http://www.patreon.com/pbsspacetime Help translate our videos! http://www.youtube.com/timedtext_cs_panel?tab=2&c=UC7_gcs09iThXybpVgjHZ_7g Previous Episode - Self-Replicating Robots and Galactic Domination https://www.youtube.com/watch?v=4H55wybU3rI Veritasium’s video Quantum Entanglement and Spooky Action at a Distance at 7:36 https://www.youtube.com/watch?v=ZuvK-od647c How the Quantum Eraser Rewrites the Past at 8:41 https://www.youtube.com/watch?v=8ORLN_KwAgs Einstein argued that elementary particles maintained their intrinsic values whether they were being observed or not. Bohr believed that in observing such particles we collapsed a wave function of probabilities. He asserted that it is only when these wave functions collapse that one of many probabilities is chosen and the particles take on distinct values. Quantum entanglement, John Stewart Bell and Alain Aspect eventually proved that Bohr was correct. Written and hosted by Matt O’Dowd Produced by Rusty Ward Made by Kornhaber Brown (www.kornhaberbrown.com) Comments: Borne Stellar https://www.youtube.com/watch?v=4H55wybU3rI&lc=z13kddtono20c1h2g22kx1brstvvsthus Strofi Kornego https://www.youtube.com/watch?v=4H55wybU3rI&lc=z12vh34b2l2uxvagy04cg5swtqf0s3gb1o00k Daniel Oberley https://www.youtube.com/watch?v=4H55wybU3rI&lc=z12rsv2yszi5td21w22aytvhxvagg1giz04

Thank you to: http://qz.com/783269/china-launched-cacs-the-worlds-most-accurate-cold-atomic-clock-into-space

Has a fifth fundamental force been discovered and how will this effect our understanding of the universe? Get your own Space Time t­shirt at http://bit.ly/1QlzoBi Tweet at us! @pbsspacetime Facebook: facebook.com/pbsspacetime Email us! pbsspacetime [at] gmail [dot] com Comment on Reddit: http://www.reddit.com/r/pbsspacetime Support us on Patreon! http://www.patreon.com/pbsspacetime Help translate our videos! http://www.youtube.com/timedtext_cs_panel?tab=2&c=UC7_gcs09iThXybpVgjHZ_7g Quantum Eraser Challenge https://www.youtube.com/watch?v=2Uzytrooz44 Previous Episode https://www.youtube.com/watch?v=jW55cViXu6s New Fundamental Particle Discovered https://www.youtube.com/watch?v=KFOgIijPWGY A laboratory in Hungary has has witnessed a startlingly strange reaction between Beryllium-8 atoms. It seems to point to the existence of a fundamental force beyond the four we already know. And this new force may have something to do with dark matter. Nature Article on Radioactive Decay Anomaly http://www.nature.com/news/has-a-hungarian-physics-lab-found-a-fifth-force-of-nature-1.19957 The associated Feng et al. 2016 paper: http://arxiv.org/abs/1604.07411 Krasznahorkay et al. 2015 first report the anomaly https://arxiv.org/abs/1504.01527 Written and hosted by Matt O’Dowd Made by Kornhaber Brown (www.kornhaberbrown.com) Challenge Winners: Dana D Michael Eby Benjamin Midtvedt Annabelle Strong Mohamad Zeina Gabriel Bean

Matt challenges you to use quantum physics to win the lottery. Are you up to the task? Previous Episode on Quantum Eraser https://www.youtube.com/watch?v=8ORLN_KwAgs Get your own Space Time t­shirt at http://bit.ly/1QlzoBi Tweet at us! @pbsspacetime Facebook: facebook.com/pbsspacetime Email us! pbsspacetime [at] gmail [dot] com Comment on Reddit: http://www.reddit.com/r/pbsspacetime Support us on Patreon! http://www.patreon.com/pbsspacetime Help translate our videos! http://www.youtube.com/timedtext_cs_panel?tab=2&c=UC7_gcs09iThXybpVgjHZ_7g The Quantum Eraser experiment seems to show that information can travel backwards in time. On today’s episode of Space Time, we are going to create a time-traveling communication device and use it to cheat on the lottery! Here's Your Challenge question: Why am I going to be sadly disappointed after turning on my invention? I do get a signal – nice work future me – and that signal DOES contain the interference patterns from my future choices with perfect fidelity. But for some reason I can’t read the numbers. What went wrong? Written and hosted by Matt O’Dowd Made by Kornhaber Brown (www.kornhaberbrown.com) Challenge Answers Submit your answers with full work to [email protected] for a chance to win a Space Time t-shirt. Make sure you use the subject title “Quantum Eraser Challenge question” to be in the running. Submit answers before August 24, 2016.

Try Audible: http://www.audible.com/spacetime Causality is meant to move in one direction: forward. But the Quantum Eraser experiment seems to reverse causality. How and why can this happen and what are the implications of this experiment on how we understand Quantum Mechanics and our greater universe? Get your own Space Time t­shirt at http://bit.ly/1QlzoBi Tweet at us! @pbsspacetime Facebook: facebook.com/pbsspacetime Email us! pbsspacetime [at] gmail [dot] com Comment on Reddit: http://www.reddit.com/r/pbsspacetime Support us on Patreon! http://www.patreon.com/pbsspacetime Help translate our videos! http://www.youtube.com/timedtext_cs_panel?tab=2&c=UC7_gcs09iThXybpVgjHZ_7g A Delayed Choice Quantum Eraser Kim, Yu, Kulik, Shih & Scully, 2000, Physical Review Letters v.84 p.1 http://arxiv.org/abs/quant-ph/9903047v1 Previous Episode on Can We Survive the Destruction of the Earth? ft. Neal Stephenson https://www.youtube.com/watch?v=UjmlwdUK4RE Previous Episode on The Quantum Experiment that Broke Reality https://www.youtube.com/watch?v=p-MNSLsjjdo Gamma Ray Bursts by In a Nutshell https://www.youtube.com/watch?v=RLykC1VN7NY Episode written and hosted by Matt O’Dowd Made by Kornhaber Brown (www.kornhaberbrown.com) Comments answered by Matt MirceaKitsune https://www.youtube.com/watch?v=UjmlwdUK4RE&lc=z12vfjjhemf1sxi5104cir5g2kisylrwdqw0k tsjoencinema https://www.youtube.com/watch?v=UjmlwdUK4RE&lc=z13axr1zmzygftjf522mwjaq5tyruty1p Weapon Valhalla https://www.youtube.com/watch?v=UjmlwdUK4RE&lc=z133h3whrzi4sfqne23htd3hymjoylkyj04 Narigone https://www.youtube.com/watch?v=UjmlwdUK4RE&lc=z12bftwgfk3wwp4ia04cc3ar2xiuvpvhnqw0k TimmacTR https://www.youtube.com/watch?v=UjmlwdUK4RE&lc=z12nhp5qypb2ytnhq04cj11xwnn2ihyieag kaleb tandberg https://www.youtube.com/watch?v=UjmlwdUK4RE&lc=z122tp3ycsv4u3kd023tyz4wfsyzzzdvn The deathless face of the unborn mind https://www.youtube.com/watch?v=UjmlwdUK4RE&lc=z12ptr35szykzf4gu04cjp3z0lmchvwwzrw0k Error 404: Hodor Not Found https://www.youtube.com/watch?v=UjmlwdUK4RE&lc=z12gefxxuufihh43t23pezs5ryalxjhbp04

In Episode 4 we look at the concept of wormholes, how they derive from General Relativity, the various different types and theories, and some under-considered uses of wormholes. We'll also discuss some myths and misunderstandings of the concept. Support the Channel on Patreon: https://www.patreon.com/IsaacArthur Listen or Download the audio of this episode from Soundcloud: https://soundcloud.com/isaac-arthur-148927746/ftl04-wormholes Cover Art by Jakub Grygier: https://www.artstation.com/artist/jakub_grygier Matt Visser's 1989 paper "Traversable wormholes: Some simple examples": https://arxiv.org/abs/0809.0907

The double slit experiment radically changed the way we understand reality. To check out any of the lectures available from The Great Courses Plus go to http://ow.ly/QVaz302duhX and get ready to learn about everything from cooking to calculus. Get your own Space Time t­shirt at http://bit.ly/1QlzoBi Tweet at us! @pbsspacetime Facebook: facebook.com/pbsspacetime Email us! pbsspacetime [at] gmail [dot] com Comment on Reddit: http://www.reddit.com/r/pbsspacetime Support us on Patreon! http://www.patreon.com/pbsspacetime Help translate our videos! http://www.youtube.com/timedtext_cs_panel?tab=2&c=UC7_gcs09iThXybpVgjHZ_7g The double slit experiment radically changed the way we understand reality. Find out what the ramifications of this experiment were and how we can use it to better comprehend our universe. Written and hosted by Matt O’Dowd Made by Kornhaber Brown (www.kornhaberbrown.com) Previous Episode https://www.youtube.com/watch?v=eJ2RNBAFLj0 The Planck Length and the Origin of Quantum Mechanics https://www.youtube.com/watch?v=tQSbms5MDvY Veritasium and the Double Slit Experiment https://www.youtube.com/watch?v=GzbKb59my3U Is Quantum Tunneling Faster than Light? https://www.youtube.com/watch?v=-IfmgyXs7z8 Comments by: Jason Blank https://www.youtube.com/watch?v=_NqbRcwWwPw&lc=z13mhf0rcurtybftb23nf3yalruqvx2dm Deisisase https://www.youtube.com/watch?v=_NqbRcwWwPw&lc=z13uifuzxlr3xvc1022ly1jo4uijfjhgj04 Bike Jake https://www.youtube.com/watch?v=_NqbRcwWwPw&lc=z13mcnhbglncgpbc122wgxsabw31xdvqw04 An Imposter https://www.youtube.com/watch?v=_NqbRcwWwPw&lc=z12hyl5z4lvsjdihn04cgbhbsnnivhbgdqw0k

To check out any of the lectures available from Great Courses Plus go to http://ow.ly/K9mK301cRdj and get ready to learn about everything from cooking to calculus. Previous episode on Quantum Tunneling and the de Broglie Wavelength: https://www.youtube.com/watch?v=-IfmgyXs7z8 Get your own Space Time t­shirt at http://bit.ly/1QlzoBi Tweet at us! @pbsspacetime Facebook: facebook.com/pbsspacetime Email us! pbsspacetime [at] gmail [dot] com Comment on Reddit: http://www.reddit.com/r/pbsspacetime Support us on Patreon! http://www.patreon.com/pbsspacetime Help translate our videos! http://www.youtube.com/timedtext_cs_panel?tab=2&c=UC7_gcs09iThXybpVgjHZ_7g Planck's Length is the length below which the concept of length loses its meaning. What exactly does that mean and what are the incredible implications this fact has upon our reality? To find out check out this episode of Space Time where Matt digs into the early history of quantum mechanics. Written and hosted by Matt O’Dowd Made by Kornhaber Brown (www.kornhaberbrown.com) Comments by: BrunoJMR https://www.youtube.com/watch?v=Dgv2WWpm7_s&lc=z12wsxth5oa1fvgzy04ccjpwjq3jxhebbc0 Prasad Deshmukh https://www.youtube.com/watch?v=Dgv2WWpm7_s&lc=z130zlxzpsnwudcfu22jc3go0yejelhrq04 Gary Palmer https://www.youtube.com/watch?v=Dgv2WWpm7_s&lc=z125vb0ygumeyzv1b224vni5sxfler2uu Ed Eggermont https://www.youtube.com/watch?v=Dgv2WWpm7_s&lc=z12kehkorrqxffvng22utliaqknid3bht04 Dylan T https://www.youtube.com/watch?v=Dgv2WWpm7_s&lc=z123yzaazwi3gl5ag04cgrqjlvexgxhrndo

Start your Audible trial today: http://www.audible.com/spacetime Hello from the other side. In this episode find out how quanta can can move through solid objects. Get your own Space Time t­shirt at http://bit.ly/1QlzoBi Tweet at us! @pbsspacetime Facebook: facebook.com/pbsspacetime Email us! pbsspacetime [at] gmail [dot] com Comment on Reddit: http://www.reddit.com/r/pbsspacetime Support us on Patreon! http://www.patreon.com/pbsspacetime Help translate our videos! http://www.youtube.com/timedtext_cs_panel?tab=2&c=UC7_gcs09iThXybpVgjHZ_7g Where are you right now? Until you interact with another particle you could be any number of places within a wave of probabilities. This is only one way that quantum mechanics challenges our perception of reality. Matt dives into these counter-intuitive ideas and explains the bizarre phenomenon known as quantum tunneling in this episode of Space Time. Written and hosted by Matt O’Dowd Made by Kornhaber Brown (www.kornhaberbrown.com) *Paper referenced in episode is "Measurement of the Single-Photon Tunneling Time" by Steinberg, Kwiat, & Chiao, 1993, Phys. Rev. Lett. 71, 708 and can be found here: http://journals.aps.org/prl/abstract/10.1103/PhysRevLett.71.708 Check out the previous episode of Space Time: Is an Ice Age Coming? https://www.youtube.com/watch?v=ztninkgZ0ws