COSMOLOGY

Simon Steel(Senior Director of Education and STEM programs) talks with Seth Shostak(Senior Astronomer) about "the great debate" in the 1920s that fundamentally changed our understanding about the size of the universe.

Sign Up on Patreon to get access to the Space Time Discord! https://www.patreon.com/pbsspacetime Check out the Space Time Merch Store https://pbsspacetime.com/ Sign up for the mailing list to get episode notifications and hear special announcements! https://mailchi.mp/1a6eb8f2717d/spacetime The universe is precisely 13.8 billion year old - or so our best scientific methods tell us. But how do you learn the age of the universe when there’s no trace left of its beginnings? Hosted by Matt O'Dowd Written by Dan Falk & Matt O'Dowd Graphics by Leonardo Scholzer, Yago Ballarini, & Pedro Osinski Directed by: Andrew Kornhaber Camera Operator: Bahaar Gholipour Executive Producers: Eric Brown & Andrew Kornhaber #space #astrophysics #cosmology Special Thanks to our Patreon Supporters Big Bang Supporters Alexander Tamas David Nicklas Fabrice Eap Juan Benet Morgan Hough Radu Negulescu Quasar Supporters Christina Oegren Mark Heising Vinnie Falco Hypernova Supporters chuck zegar Danton Spivey Donal Botkin Edmund Fokschaner Hank S John Hofmann John Pollock John R. Slavik Jordan Young Joseph Salomone Julian Tyacke Mathew Matthew O'Connor Matthew Ryan Syed Ansar Timothy McCulloch william bryan Gamma Ray Burst Supporters A G Adrian Hatch Adrien Molyneux AlecZero Andreas Nautsch Bradley Jenkins Brandon labonte Brandon Lattin Brian Blanchard Craig Stonaha Dan Warren Daniel Lyons David Bethala David Hughes DFaulk Eric Kiebler Frederic Simon Geoffrey Short Graydon Goss Greg Smith Jennifer Crosley John Funai John Robinson Josh Thomas Justin Waters Kevin Lee Kevin Warne Kyle Hofer Malte Ubl Mark Daniel Cohen Michael Conroy Mirik Gogri Nick Virtue Nick Wright Nickolas Andrew Freeman Patrick Sutton Paul Rose Protius Protius Robert Ilardi Scott Gossett Sean Warniaha Shane Calimlim Simon Oliphant Steve Bradshaw Tatiana Vorovchenko Tim Stephani Tonyface Tybie Fitzhugh Yannick Weyns Yurii Konovaliuk Kiersten Thamm

In a special live webcast, theoretical cosmologist and science communicator Katie Mack — known to her many Twitter followers as @astrokatie — will answer questions about her favourite subject: the end of the universe. Mack is an Assistant Professor at North Carolina State University whose research investigates dark matter, vacuum decay, and the epoch of reionization. Mack is a popular science communicator on social media, and has contributed to Scientific American, Slate, Sky & Telescope, Time, and Cosmos. Perimeter's outreach programs like this are supported by viewers like you. Be part of the equation: https://insidetheperimeter.ca/donate/ Sign up for alerts about upcoming webcasts and events: https://insidetheperimeter.ca/newsletter/ Check out Perimeter's range of free, stay-at-home science resources for explorers of all ages: https://insidetheperimeter.ca/stay-at-home-science-for-explorers-of-all-ages/

Rick’s Roundtable is a virtual Town Hall meeting with Center Director Dr. Rick Gilbrech. Dr. Gilbrech will be answering questions submitted by the Stennis Space Center workforce during the roundtable session.

NASA's Chandra X-ray Observatory and ESA's XMM-Newton have been used to study the Universe and the results call into question how it is expanding. -- Surprise! The universe's expansion rate may vary from place to place: https://www.space.com/universe-expansion-rate-may-vary.html Credit: NASA/CXC/A. Hobart

Sound Issues resolved at 15:15 There's been a lot of upheaval in the field of cosmology wrt the Hubble Constant. Two independent measurements have yielded different results and they uncertainties do not overlap. This has lead to a rethinking of many aspects of how we know what we know about the universe, including the Hubble parameter. In today's Astro Coffee Hangout, Tony and Dr. Brian Keating from the University of San Diego discuss the Hubble Constant, the problem and whether there this is actually a crisis in our understanding of the large scale structure of the universe and this important parameter. Brian Keating and Nobel Prize winner Adam Riess discussed the crisis last summer in Symmetry magazine https://www.symmetrymagazine.org/article/the-9-percent-difference “ #HubbleConstant #LiveAstronomy #DeepAstronomy Follow Brian's YouTube Channel Here: https://www.youtube.com/DrBrianKeating Get Brian's Book "Losing the Nobel Prize" here (now in paperback): http://amzn.to/2sa5UpA Interested in supporting Deep Astronomy and getting great telescope gear? Use this link to shop at OPT (aff link): http://bit.ly/2Wq0BO8 Join our Chat on Discord here: https://discord.gg/nqGpvtK Like this content? Please consider becoming a patron: https://patreon.com/DeepAstronomy Follow DeepAstronomy on Twitter: @DeepAstronomy Watch Tony's Twitch Tuesdays on Twitch: https://twitch.tv/DeepAstronomy

First Astro Coffee of the year! Today I'm talking with Dr Brian Keating, a professor of physics at the University of California, San Diego; a Fellow of the American Physical Society; a commercially rated pilot; and the director of the Simons Observatory. His book "Losing the Nobel Prize" is now out in paperback tells his story working on the frontiers of cosmology as inventor/co-inventor of the BICEP and BICEP 2 (Background Imaging of Cosmic Extragalactic Polarization) Telescopes. Join Tony live as he plays a pre-recorded interview from 2019 and ask questions and chat! #AstroCoffee #LiveAstronomy Follow Brian's YouTube Channel Here: https://www.youtube.com/DrBrianKeating Get Brian's Book here: http://amzn.to/2sa5UpA Join our Chat on Discord here: https://discord.gg/nqGpvtK Like this content? Please consider becoming a patron: https://patreon.com/DeepAstronomy Follow DeepAstronomy on Twitter: @DeepAstronomy Like DeepAstronomy on Facebook: https://www.facebook.com/DeepAstronomy/

Download the PBS Video App: https://www.pbs.org/pbs-video-app/ The universe is microwaving itself. A mystery signal discovered in the 1960s led to a Nobel prize. In this video, Dianna explores one of the most mysterious discoveries in physics - a constant microwave signal that seemed to be coming from everywhere in the universe. It turned out to be light from an unusual process 13.8 billion years ago. Special thanks to our Sally Ride level patrons: Alejandro Gutierrez, Brian O'Connell, Darkbit, Dave Butler, David Cichowski, Edi, Fabrice Eap, Henning Bitsch, Kenneth Hunter, Margaux Lopez, and Vincent Flores. Join the Physics Girl Patreon community! ►► https://www.patreon.com/physicsgirl Check out MinutePhysics - Why do compressed air cans get cold? https://www.youtube.com/watch?v=kjraelDMrFQ If you liked this video check out these: Why is the universe flat? https://www.youtube.com/watch?v=MTUsOWtxKKA How the Edge of our Galaxy Defies Known Physics https://www.youtube.com/watch?v=c6Eq2sI1NDY MANY thanks to: Nick Lucid, Katie Mack, Derek Muller, Henry Reich, Thom Ory and Edward Wright for helping with this video! Thanks to Levi Butner for inspiriting the idea for this video by asking me WAY too many questions during work! 🙂 http://physicsgirl.org/ http://twitter.com/thephysicsgirl http://facebook.com/thephysicsgirl http://instagram.com/thephysicsgirl Creator/Host: Dianna Cowern Editor: Levi Butner Writing: Valerie Bentivegna Research/Copy Editing: Dianna Cowern Sources: Temperature and wavelength of original CMB: http://www.astro.uvic.ca/~jwillis/teaching/astr405/astr405_lecture3.pdf http://www.astronomy.ohio-state.edu/~ryden/ast162_9/notes39.html ESA Planck References: http://www.esa.int/Science_Exploration/Space_Science/Planck NASA WMAP Reference: https://map.gsfc.nasa.gov Interview with John G. Cramer (via email) https://kipac.stanford.edu/highlights/understanding-dark-energy-through-cmb-observations Nobel prize photo - Alexander Mahmoud 2018 https://www.aps.org/publications/apsnews/200207/history.cfm

Where do we come from? As we enter an age of unprecedented space studying and exploration, one active area of research is the story of earliest moments of cosmic time. In today's video, we retell that story; from the very earliest moment after the Big Bang, to the first stars and galaxies over 13 billion years ago. To be continued! Part 2 will be my 200K subscriber special! Follow my new Twitter: https://twitter.com/SEA_yt_ Join the official partner #SeaSquad Discord Server: https://discord.gg/SEA Business Enquiries: [email protected] Thanks to Miyu for the new channel icon! Credits and Sources ======================== VIDEO MUSIC: - As The World Fell - CO.AG Music - Chernobyl (Approaching Disaster) - CO.AG Music - Beautiful Days - CO.AG Music - Remember Trees? - Chris Zabriskie - That Hopeful Future is All I've Ever Known - Chris Zabriskie - There's a Special Place for Some People - Chris Zabriskie - Stories About the World That Once Was - Chris Zabriskie - Gaia in Fog - Dan Bodan (YouTube Audio Library) - Let The Pain Speak to Me - Chris Zabriskie CO.AG Music: https://www.youtube.com/channel/UCcavSftXHgxLBWwLDm_bNvA All tracks by Chris Zabriskie licensed under a Creative Commons Attribution license (https://creativecommons.org/licenses/by/4.0/) Artist: http://chriszabriskie.com/ VIDEO FOOTAGE: - GNz-11: https://www.youtube.com/watch?v=vgQdQx3V1HY - Galaxy Collision 4K: https://www.youtube.com/watch?v=CcopGM8iUCY Multiple sequences in this video were captured using SpaceEngine Pro, the virtual universe simulator! http://spaceengine.org/ Get SpaceEngine on Steam and try it for yourself: https://store.steampowered.com/app/314650/SpaceEngine/ Much of the stock footage in this video was provided by Videezy.com. Check them out: https://www.videezy.com/ - "Pulsar in a Box" (NASA): https://youtu.be/jwC6_oWwbSE - Simulation of Gravitational Waves (MIT): https://www.youtube.com/watch?v=biwlfcljx9Q - Hubble Telescope Footage: https://www.youtube.com/watch?v=Un5SEJ8MyPc - Void / Dust Footage: https://www.youtube.com/watch?v=Nw6Y5RldX9I - Supernova: https://www.youtube.com/watch?v=xIdJtIDReM8 - Satellite Dish: https://www.videezy.com/members/beachfront - Provided by Beachfront under a Creative Commons license - Particles: https://www.youtube.com/watch?v=G_Q6I7nj23A - Provided by RoyaltyFreeTube under a Creative Commons License SOURCES OF INFORMATION: - The Big Bang: https://en.wikipedia.org/wiki/Big_Bang - Plank Length / Time: https://www.physlink.com/education/askexperts/ae281.cfm - Early Universe Hints: https://www.nytimes.com/2006/03/17/science/space/17cosmos.html - Neutrons vs. Neutrinos: https://socratic.org/questions/what-is-the-difference-between-neutrons-and-neutrinos - Fields: https://en.wikipedia.org/wiki/Field_(physics) - First Molecule: https://www.space.com/astronomers-detect-universe-first-molecule-space.html - The CMB: https://www.youtube.com/watch?v=3tCMd1ytvWg https://www.space.com/33892-cosmic-microwave-background.html - Early Star Populations: https://en.wikipedia.org/wiki/Stellar_population

The Big Bang is the term that scientists use to describe the beginning of the universe. In this video, Fermilab’s Dr. Don Lincoln clears up many common misconceptions about this fascinating topic. To learn more, visit: http://fnal.gov

Is the universe curved? Not so fast. With SPACETV Writer and Host Cambrie Caldwell. Learn more The Planck Space Observatory - https://www.spacetv.net/planck-space-telescope/ The Universe - http://www.spacetv.net/the-universe/ The Big Bang - https://www.spacetv.net/the-big-bang/ Cosmology - http://www.spacetv.net/cosmology/ Sources: https://www.space.com/universe-shape-flat-closed-debate.html Credits General Relativity image - Lucas Vieira Barbosa Plank Satellite animation - ESA Cosmic Microwave Background image - NASA Big Crunch animation - NASA/STScI/G.Bacon SPACETV.NET

It's Night Sky News time again where we recap everything that's happened in space news this past month and everything to look out for in the sky in the coming month. This month a paper was published which really cemented the crisis in cosmology - none of the data agreed on the age of the Universe before, but now it just got a whole lot worse. #stargazing #spacenews #astronomy 00:27 - Moon with Spica, Mars & Mercury 01:27 - Venus and Jupiter conjunction 02:24 - Venus and Saturn close in the sky 02:51 - Geminids Meteor Shower 💫❤️ 04:31 - The smallest black hole ever discovered - https://arxiv.org/pdf/1806.02751.pdf 09:08 - A planet engulfed by a red giant star? - https://arxiv.org/pdf/1909.05961.pdf 14:22 - A crisis in cosmology - the shape, age and content of the Universe - https://arxiv.org/abs/1911.02087 ----- My new book 'Space: The 10 Things You Should Know' is out now worldwide (except US & Canada) on September 5th 2019! You can pre-order it (UK only) 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 ------------ News Theme 1 by Audionautix is licensed under a Creative Commons Attribution license (https://creativecommons.org/licenses/by/4.0/) Artist: http://audionautix.com/

For some, the "Big Bang" was when the universe came into being... There was nothing before, and everything afterwards! But, what if this universe WASN'T the first of its kind? In this video, Unveiled explores the radical theories claiming that our cosmos is actually just one in a long line of alternative realities... and that somewhere out there is an "anti-universe", the perfect opposite of our own. What do you think... Did another universe exist before ours? This is Unveiled, giving you incredible answers to extraordinary questions! Find more amazing videos for your curiosity here: What If Humanity Was A Type V Civilization? - https://www.youtube.com/watch?v=DGB7hPX0wc0 How Many Stars Are in the Universe? - https://www.youtube.com/watch?v=vmtwvSeW0hc Are you constantly curious? Then subscribe for more from Unveiled ► https://goo.gl/GmtyPv #Universe #Space #BigBangTheory #BigBounce #Multiverse #SolarSystem

Download audio http://bigpicturescience.org/episodes/radical-cosmology (repeat) 400 years ago, some ideas about the cosmos were too scandalous to mention. When the Dominican friar Giordano Bruno suggested that planets existed outside our Solar System, the Catholic Inquisition had him arrested, jailed, and burned at the stake for heresy. Today, we have evidence of thousands of planets orbiting other stars. Our discovery of extrasolar planets has dramatically changed ideas about the possibility for life elsewhere in the universe. Modern theories about the existence of the ghostly particles called neutrinos or of collapsed stars with unfathomable gravity (black holes), while similarly incendiary, didn’t prompt arrest, of course. Neutrinos and black holes were arresting ideas because they came decades before we had the means to prove their existence. Hear about scientific ideas that came before their time and why extrasolar planets, neutrinos, and black holes are now found on the frontiers of astronomical research. Guests: Alberto Martínez https://liberalarts.utexas.edu/history/faculty/aam829 – Professor of history, University of Texas, Austin, and author of Burned Alive: Giordano Bruno, Galileo & the Inquisition https://www.amazon.com/gp/product/1780238967/ref=as_li_tl?ie=UTF8&tag=arweal-20&camp=1789&creative=9325&linkCode=as2&creativeASIN=1780238967&linkId=a2467da5744402bda9f93126c6efba9d Anne Schukraft http://home.fnal.gov/~aschu – Associate scientist, Fermilab National Accelerator Laboratory Ephraim Fischbach https://www.physics.purdue.edu/people/faculty/ephraim.php – Professor of physics and astronomy, Purdue University Chris Impey http://chrisimpey-astronomy.com/ – Professor of astronomy, University of Arizona, and author of Einstein’s Monsters: The Life and Times of Black Holes https://www.amazon.com/gp/product/1324000937/ref=as_li_tl?ie=UTF8&camp=1789&creative=9325&creativeASIN=1324000937&linkCode=as2&tag=arweal-20&linkId=e4ed741a4d740a34119b22204c3150a0 Descripción en español http://bigpicturescience.org/es/episodes/cosmologia-radical Segments: Part 1: Alberto Martinez / Heretical Exoplanets Part 2: Anne Schukraft / Detecting Neutrinos Part 3: Ephraim Fischbach / New Neutrino Detector Part 4: Chris Impey / Predicting Black Holes The links to the books above are Amazon Associates links. As an Amazon Associate, SETI receive a commission from qualifying purchases. If you'd prefer to buy books at your local bookseller, you can still donate directly to Big Picture Science https://seti.org/support-big-picture-science originally aired February 18, 2019 ©2019 SETI Institute. All Rights Reserved 189 Bernardo Ave, Suite 200, Mountain View, CA 94043 Phone 650.961.6633 https://www.seti.org

You can buy Universe Sandbox 2 game here: http://amzn.to/2yJqwU6 Hello and welcome! My name is Anton and in this video, we will talk about Music: HOME – We’re Finally Landing: https://youtu.be/eGigHoRQATs HOME – If I’m Wrong: https://youtu.be/HBynMB054zw HOME – Synchronize: https://youtu.be/krPful3ejYc Three Chain Links – Hot Nights in Los Angeles: https://youtu.be/ACvtdUeiQ9U Support this channel on Patreon to help me make this a full time job: https://www.patreon.com/whatdamath Space Engine is available for free here: http://spaceengine.org Enjoy and please subscribe. Twitter: https://twitter.com/WhatDaMath Facebook: https://www.facebook.com/whatdamath Twitch: http://www.twitch.tv/whatdamath Bitcoins to spare? Donate them here to help this channel grow! 1GFiTKxWyEjAjZv4vsNtWTUmL53HgXBuvu The hardware used to record these videos: CPU: https://amzn.to/2LZFQCJ Video Card: https://amzn.to/2M1W26C Motherboard: https://amzn.to/2JYGiQQ RAM: https://amzn.to/2Mwy2t4 PSU: https://amzn.to/2LZcrIH Case: https://amzn.to/2MwJZz4 Microphone: https://amzn.to/2t5jTv0 Mixer: https://amzn.to/2JOL0oF Recording and Editing: https://amzn.to/2LX6uvU Thank you to all Patreon supporters of this channel Specifically, great thanks to the following members: Morrison Waud Vlad Manshin Mark Teranishi TheHuntress Daniel Rosvall Lilith Dawn Ralph Spataro Albert B. Cannon Greg Lambros adam lee Henry Spadoni Jer Nick Dolgy Luminger Konrad Kummli UnexpectedBooks.com Gabriel Seiffert George Williams J Carter Mary Kristof Oleg Hurmak Shinne Jakub Glos Lauren Smith Michael Tiganila Lyndon Riley Johann Goergen Jake Salo LS Greger Dave Blair Michael Mitsuda Russell Sears Vinod sethi Robert Wyssbrod RandalM Gordon Cooper Tracy Burgess Assaf Dar Sagol Jayjay Volz Liam Moss Timothy Welter MD Kai Raphahn Sander Stols Anataine Deva Sergio Ruelas Bodo Graßmann Douglas Burns gary steelman Jan Å oulák Michael Koebel Olegas Budnik Shelley Passage Steven Aiello xyndicate Honey Suzanne Lyons Dale Andrew Darling James Myers Niji Peter Hamrak Matthew Lazear Anton Newman Anton Reed Charles Nadeau Daniel Charles Smith Daniel G. Dave A Doug Baker Doug MacDonald Eugene Sandulenko GrittyFlix Max McNally Minovsky Man Mr Fluffington Paul Koploy Sal Carrera Victor Julian Castillo Becky Steven Jacob Spencer brian plummer Lee Densmore Sir David Coyne Veronika A. Czebe Steve Wotton Adam Smith Alberto Diaz Saldana Chaos Gamer Daniel Coleman Jana Persson Kearny Li Rafael Aguila Rock Howard Tedd Speck rfc1135 Vincent L. Cleaver Claye Griffith David Lewis JohnTaylorWalker Kyle eagle Michael J Fluharty Tarik Qassem Scary ASMR Arp Lee Barnard Rabenold Lisa Stadlbauer Lisette Ramos-Voigt Márton Fülöp Reynir Guðmundsson Rs Wlms tom g. Greyson Flippo Hampton Tunis Ivan Gallagher Jordaen Davids Lynn Johnson Rob Law Thierry Ray Jehlen Gasnier Troy Schmidt William Warren Arikkat Unnikrishnan Uwe Böhnke Carla Deanna Korell-Hall Dipen Bhattacharya Josh Shultz Samuel Mathison Bryan Linsley Chris Bingley David Bennett David Wortz Douglas Wilkinson Lionel Sleeper Markus Bidi Matthew C Weiss Michael McCloskey Mr. Numi Who- Orlando J Carter Peter Sedmák Randall J Silva Vladyslav Kurmaz Walter van der Kamp Brittany House david jungerman Doug Beeferman JL Solidum Luis M Gaytan Tovar Men I Trust Sol Bergeron Beauchemin Hernán Coronel Mr MOD Branden Loizides Chris the Mad Sciencer Christopher Borra Dave Hein Spijker Ingmar Rauschert James McClarty karlos preddie Kitara Burke Lance Fielden Laura Coutu Luis Lengsfeld Lumi Pakkanen MARK ANDERSON Michael R Mendoza Miek Thompson [email protected] Robert Clyde Steven Uttley Susanne Bauer Suzanne Brummitt Yvan Lengwiler Łukasz Adamski Todd Gregory-Gibbs Adam Burnett Christian Rane gene valle Hidden Hinges Jan-Chris Jelle Baris john requa Joseph Conard kristian svensson Qauthar Saleh Tuukka Arola Allen DuBeau Bob Goswick Daniel Schakel Derek Bamber Gerald Williams Gideon Falta Gregory T Hart Jennifer Pumphrey Marcel Barros Michael Luce Peyton Vaughn Quasar Sandy Flowers Svein Trondsen Bonnie Veldey Christian Jochum Daniel Morris Dreameroutthere Jeff Blakemore Maciej Świerczewski Mahesh Gopalan Marilyn Aldridge Paul Maybury Richard Reich RiddleJacks Sean Spartan Tim Jones Paul dunn Robert the Green JoachimB Alec Estrada Devonte Foy Gawen Thompson Jessica Anderson Ketan More Nina and Ivan PartyMartyy & Dem OTF Bois Patrick Denny PAUL G STEWART Sander Hollebrand Suzanne Miezis ZarconDeeGrissom Galen Thurber Indy Car Joseph Wheeler Julia Ruggiero Norm Zemke Phlllp A Falson Rafael Espericueta Brian Jorgensen Darktorn David Campos Irene Ka Jefware Laura Sanborn maycon kruger Mike Laffoon Patrik Franzén Stephen Bowland Vyacheslav Ermakov Check Patreon to join!

Exoplanets and cosmology - the 2019 Nobel Prize in Physics goes to Jim Peebles, Michel Mayor, and Didier Queloz. More links and info below ↓ ↓ ↓ Discussed by Mike Merrifield and Ed Copeland from the University of Nottingham. See our other physics Nobel videos at: http://bit.ly/SSNobel Some extra interview footage with Ed about Jim Peebles: https://youtu.be/ro_K6-8ABqQ More on the CMBR: https://youtu.be/1loJTy6bOu8 More on Exoplanets: https://youtu.be/SnoCAWCZC7A 2019 Nobel Prize in Chemistry: https://youtu.be/zy1BhVhpGN0 Just some of the papers discussed in this video... A Jupiter-mass companion to a solar-type star https://www.nature.com/articles/378355a0 A planetary system around the millisecond pulsar PSR1257 + 12 https://www.nature.com/articles/355145a0 A Measurement of Excess Antenna Temperature at 4080 Mc/s http://adsabs.harvard.edu/doi/10.1086/148307 Cosmic Black-Body Radiation http://adsabs.harvard.edu/doi/10.1086/148306 Visit our website at http://www.sixtysymbols.com/ We're on Facebook at http://www.facebook.com/sixtysymbols And Twitter at http://twitter.com/sixtysymbols This project features scientists from The University of Nottingham http://bit.ly/NottsPhysics Patreon: https://www.patreon.com/sixtysymbols Sixty Symbols videos by Brady Haran http://www.bradyharanblog.com Email list: http://eepurl.com/YdjL9 CORRECTION Apologies for typo of Quelor in the video - it is Queloz. Good thing I am not in charge of engraving the medal!

We interview the creators of 3 models of the early universe that imply the big bang came from a black hole in a mother universe. The models are Cosmological Natural Selection (CNS), The Holographic Big Bang and Cosmology with Spin and Torsion. The creators interviewed are Lee Smolin, Nikodem Poplawski and Niayesh Ashfordi. Recently it has also been shown that a theory of quantum gravity called Causal Set Theory may realise CNS. And so we also talk to Stav Zalel who has worked on this idea and cosmologist Aureliein Barau The order of subjects is LS: Lee Smolin NA: Niayesh Ashfordi SZ: Stav Zalel NP: Nikodem Poplowski AB: Aurelien Barau 00:00 Introduction 51:55 LS and SZ on CNS 3:53 the prehistory of CNS 6:08 NA doubt on fine tuning 7:33 NA on The Holographic Big Bang 10:32 NA explains The Holographic Principle 13:41 NP on Cosmology with Spin and Torsion 16:16 NP on anti matter 17:44 SZ on quantum gravity 18:21 LS and NP on the big bounce 20:23 SZ and AB on Causal Set Theory 21:32 SZ on comparison with Loop Quantum Gravity 21:47 AB and SZ on predicting the cosmological constant 23:24 SZ on linking CNS and Causal Set Theory 24:53 NA on string theory connection 25:46 LS on neutron star predictions 30:15 LS on inflation and CNS 31:08 NP on inflation and torsion 33:08 NA on replacing inflation 35:25 LS on CNS versus eternal inflation 36:55 NA on the difference between CNS and The Holographic Big Bang 37:14 LS, NP and NA on entropy 38:40 LS and NA on Roger Penrose’s criticism 40:47 LS, NP, SZ and NA on an eternal past 43:49 LS on answering Leonard Susskind 44:39 LS on scare resources 45:08 NA on CMB predictions 46:06 LS summing up

The Universe started in the Big Bang and ever since then space has been expanding - increasing the distance between galaxies ever since. Galaxy mergers are also very common though - so how does this happen if galaxies are always moving apart from each other? #bigquestions My book ' Space: 10 Things You Should Know' is out NOW worldwide (except for US & Canada - more info soon) you can find it in your local bookshop or order it here: http://bit.ly/SpaceDrBecky ----------- Follow me on Twitter: https://twitter.com/drbecky_ And on Instagram: https://www.instagram.com/drbecky_s/ Don't forget to subscribe and click the little bell icon to be notified when I post a new video! --------- Dr Becky Smethurst is an astrophysicist researching galaxies and supermassive black holes at Christ Church at the University of Oxford. http://drbecky.uk.com

Check out the new Space Time Merch Store! https://pbsspacetime.com/ Support Space Time on Patreon https://www.patreon.com/pbsspacetime We actually have a pretty good idea of what might have happened before the Big Bang. That is, as long as we define the Big Bang as the extremely hot, dense, rapidly expanding universe that is described by Einstein’s equations. That picture of the universe is very solid down to about a trillionth of a second after the supposed beginning of time. We can make good guesses down to about 10^-30th of a second. But before that? Hosted by Matt O'Dowd Written by Matt O'Dowd Graphics by Leonardo Scholzer Directed by Andrew Kornhaber Produced By: Kornhaber Brown Check out the Big Bang and Cosmic Inflation Playlist to learn More https://www.youtube.com/watch?v=aPStj2ZuXug&list=PLsPUh22kYmNCc3WCKb5yF136QSRf0xErm Want Even More Great Space Content? Check out the Exciting STELLAR Playlist https://www.youtube.com/playlist?list=PL1mtdjDVOoOqY7QPHGa9OppO_pjf91lbV Big Bang Supporters: Alexander Tamas Anton Lifshits David Nicklas Fabrice Eap Juan Benet Morgan Hough Quasar Supporters: Mark Heising Mark Rosenthal Vinnie Falco Hypernova Supporters: Chuck Zegar Danton Spivey Donal Botkin Edmund Fokschaner Hank S John Hofmann John R. Slavik Jordan Young Joseph Salomone Matthew Matthew O'Connor Syed Ansar Gamma Ray Burst Supporters: Adrien Hatch Adrian Molyneux Alexey Eromenko Andreas Nautsch Bradley Jenkins Brandon Labonte Carlo Mogavero Dan Warren Daniel Lyons David Behtala DFaulk Dustan Jones Geoffrey Short James Flowers James Quintero John Funai John Pollock Jonah Jonathan Nesfeder Joseph Dillman Josh Thomas Kevin Warne Kyle Hofer Malte Ubl Mark Vasile Nathan Hitchings Nicholas Nachefski Nick Virtue Paul Rose Scott Gossett Sigurd Ruud Frivik Taras Vozniuk Tim Jones Tim Stephani Yurii Konovaliuk سلطان الخليفي

A new study provides mathematical evidence that dark matter could be much older than we thought and we've found a weird glitch in a neutron star. Host: Hank Green SciShow has a spinoff podcast! It's called SciShow Tangents. Check it out at http://www.scishowtangents.org ---------- Support SciShow by becoming a patron on Patreon: https://www.patreon.com/scishow ---------- Huge thanks go to the following Patreon supporters for helping us keep SciShow free for everyone forever: Adam Brainard, Greg, Alex Hackman, Sam Lutfi, D.A. Noe, Piya Shedden, KatieMarie Magnone, Scott Satovsky Jr, Charles Southerland, Patrick D. Ashmore, charles george, Kevin Bealer, Chris Peters ---------- Like SciShow? Want to help support us, and also get things to put on your walls, cover your torso and hold your liquids? Check out our awesome products over at DFTBA Records: http://dftba.com/scishow ---------- Looking for SciShow elsewhere on the internet? Facebook: http://www.facebook.com/scishow Twitter: http://www.twitter.com/scishow Tumblr: http://scishow.tumblr.com Instagram: http://instagram.com/thescishow ---------- Sources: https://journals.aps.org/prl/abstract/10.1103/PhysRevLett.123.061302 https://arxiv.org/pdf/1905.01214.pdf https://www.eurekalert.org/pub_releases/2019-08/jhu-dmm080719.php https://gizmodo.com/this-theory-could-breathe-new-life-into-the-hunt-for-da-1837110948 https://profmattstrassler.com/articles-and-posts/the-higgs-particle/why-is-it-hard-to-find-the-higgs-particle/a-lightweight-standard-model-higgs-particle/ https://www.forbes.com/sites/startswithabang/2018/04/12/how-come-cosmic-inflation-doesnt-break-the-speed-of-light/ https://wmap.gsfc.nasa.gov/universe/bb_cosmo_infl.html https://blogs.scientificamerican.com/critical-opalescence/gravitational-waves-reveal-the-universe-before-the-big-bang-an-interview-with-physicist-gabriele-veneziano/ https://www.nature.com/articles/s41550-019-0844-6 https://www.eurekalert.org/emb_releases/2019-08/mu-gin080719.php ------ Images: https://www.eso.org/public/videos/eso1709c/ https://svs.gsfc.nasa.gov/12656 https://svs.gsfc.nasa.gov/12314 https://www.spacetelescope.org/videos/astro_bu/ https://svs.gsfc.nasa.gov/10118 https://svs.gsfc.nasa.gov/20267 http://chandra.si.edu/photo/2013/vela/ https://www.eso.org/public/videos/eso1810b/