EXTRATERRESTRIAL LIFE

Have you heard the news? Cassini may be dead, but it's data is still very much alive! Check out out latest video about Cassini's exciting discovery in the plumes of Enceladus! Follow us on social media and our website! Facebook: https://facebook.com/ActiveGalacticVideos Twitter: https://twitter.com/activegalactic Instagram: https://instagram.com/activegalacticvideos Snapchat: @active_galactic Website: http://activegalacticvideos.com/ Check out some of our other videos: Highlights of the Cassini Mission https://youtu.be/JKAHESinAUw News article reference: https://news.nationalgeographic.com/2018/06/saturn-moon-enceladus-complex-organics-life-space-science/

While our search is still in its infancy, we haven't yet found any obvious signs of intelligent life in our galaxy. One reason could be that any advanced civilization out there may not have made it past a stage in its development where climate change became an issue. As technologies advance and use more resources on a planet, care needs to be taken that the planet's carrying capacity is not overwhelmed. This could lead to the demise of a civilization and prevent it from expanding to the stars. Our guests for this hangout have done some modelling on the possible consequences of advancing technology and its effects on the host planet. Please join Tony Darnell and Carol Christian as they discuss this interesting work with Adam Frank University of Rochester Jonathan Carroll-Nellenback, U Rochester and Lindsey Valich, the team members of this recent study. Links t the press release and paper: http://www.rochester.edu/newscenter/astrobiology-alien-apocalypse-can-any-civilization-make-it-through-climate-change-322232/ https://www.liebertpub.com/doi/10.1089/ast.2017.1671 Really good video on the downfall of Easter Island: https://www.youtube.com/watch?v=d6aEaMiDeUw Like this content? Please consider becoming a patron: https://patreon.com/DeepAstronomy Follow DeepAstronomy on Twitter: @DeepAstronomy Join our free Discord server for always-on chat action! https://discord.gg/nqGpvtK

Visit our sponsor, Brilliant: https://brilliant.org/IsaacArthur/ Watch Part 2: https://youtu.be/tbvmxo90F9I For today's 2-part episode we team again with John Michael Godier to discuss the future of humanity should we head out to colonize the galaxy and find it empty, and how we might end up encountering aliens even then. Visit our Website: http://www.isaacarthur.net Support us on Patreon: https://www.patreon.com/IsaacArthur SFIA Merchandise available: http://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/v5UKTsz Listen or Download the audio of this episode from Soundcloud: Episode's Audio-only version: https://soundcloud.com/isaac-arthur-148927746/galactic-humanity-and-the-fermi-paradox Episode's Narration-only version: https://soundcloud.com/isaac-arthur-148927746/galactic-humanity-and-the-fermi-paradox-narration-only Credits: Galactic Humanity & the Fermi Paradox, part 1 Episode 143, Season 4, E28 Writers Isaac Arthur John Micheal Godier Cover Artist: Jakub Grygier https://www.artstation.com/jakub_grygier Graphics Team: Dath Biomech Jarred Eagley Jeremy Jozwik Justin Dixon Ken York Kristijan Tavcar LegionTech Studios https://hades9.com Mihail Yordanov Sergio Botero https://www.artstation.com/sboterod?fref=gc Narrators: Isaac Arthur John Michael Godier Music: Lombus, "Cosmic Soup" https://lombus.bandcamp.com Denny Schneidemesser, "Luminous Rays" https://soundcloud.com/denny-schneidemesser Aerium, "Fifth Star from Aldebran" https://www.youtube.com/channel/UCRnUJY3l5vIJFGsY3XvW4dQ Miguel Johnson, "So Many Stars" https://soundcloud.com/migueljohnsonmjmusic Lombus, "Hydrogen Sonata" https://lombus.bandcamp.com Don't forget to catch Part 2 and thanks for Watching! Part 2: https://youtu.be/tbvmxo90F9I

Part II of a collaboration with Isaac Arthur on the possibilities of a galactic human future and what that might entail. Part I: https://youtu.be/-eG6vKe3OY0 https://www.brilliant.org/JMG Our previous collaboration on the concept of Uplifting: https://youtu.be/QzaYnrrEKbU https://youtu.be/wfDHt68-ANU Music: Drone in D by Kevin MacLeod is licensed under a Creative Commons Attribution license (https://creativecommons.org/licenses/by/4.0/) Source: http://incompetech.com/music/royalty-free/index.html?isrc=USUAN1200044 Artist: http://incompetech.com/ Cylinder Three 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/ Lost Frontier by Kevin MacLeod is licensed under a Creative Commons Attribution license (https://creativecommons.org/licenses/by/4.0/) Source: http://incompetech.com/music/royalty-free/index.html?isrc=USUAN1300039 Artist: http://incompetech.com/ Cylinder Eight 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/ Endless Story About Sun and Moon by Kai Engel is licensed under a Attribution-NonCommercial License. https://www.kai-engel.com/ 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/

An exploration of SETI and the possibility of detecting alien von Neumann probes at focal points of stellar gravitational lensing. http://www.patreon.com/johnmichaelgodier Papers: "A novel SETI strategy targeting the solar focal regions of the most nearby stars" Gillon, 2013 https://arxiv.org/pdf/1309.7586.pdf Music: Cylinder Eight 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/

An update in my continuing coverage on the possibilities for life at Saturn's Moon Enceladus. "Macromolecular organic compounds from the depths of Enceladus" Postberg et al, 2018 https://www.nature.com/articles/s41586-018-0246-4 Music: Cylinder Eight 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/

An exploration into the concept of population and how that affects the Fermi Paradox question. Do advanced alien civilizations necessarily have the population numbers to colonize the galaxy entirely? Music: Cylinder Eight 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/ Cylinder Three 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/ 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/ Darkest Child by Kevin MacLeod is licensed under a Creative Commons Attribution license (https://creativecommons.org/licenses/by/4.0/) Source: http://incompetech.com/music/royalty-free/index.html?isrc=USUAN1100783 Artist: http://incompetech.com/

The Search for Extraterrestrial Intelligence (SETI) has been growing in confidence and repute lately thanks to astronomer's detections of habitable worlds and the private funding been poured into the enterprise. With renewed efforts afoot, it's worth pausing for a moment and asking - well what do we do if we succeed? How should the scientists communicate their results? How will the public react? Social media in particular disrupts the conventional pattern of scientific announcements and poses some interesting challenges for SETI. In this video we perhaps end up asking more questions than answers, but let's get into a discussion in the comments about how best to proceed! ::More about this Video:: ► International Academy of Astronautics Post Detect Protocol (1989): https://iaaseti.org/en/declaration-principles-concerning-activities-following-detection/ ► International Academy of Astronautics Post Detect Protocol (2010): http://resources.iaaseti.org/protocols_rev2010.pdf ► The Rio Scale paper, Almar & Tartar (2011): https://www.sciencedirect.com/science/article/pii/S0094576509003683 ► Rio Scale calculator: http://avsport.org/IAA/riocalc.htm ► Centauri Dreams blog article about the RATAN-600 signal: https://www.centauri-dreams.org/2016/08/27/an-interesting-seti-candidate-in-hercules/ ► Astronomy.com debunk the RATAN-600 signal: http://www.astronomy.com/news/2016/08/the-promising-seti-signal-probably-isnt-aliens ► World Science Festival: "Alien Contact: What Happens Next?": https://www.worldsciencefestival.com/programs/alien-contact-happens-next/ ► Columbia University Department of Astronomy: http://www.astro.columbia.edu ► Cool Worlds Lab website: http://coolworlds.astro.columbia.edu ► Outro music by 8-bit Universe "Harder Better Faster Stronger [8 Bit Cover Tribute to Daft Punk]": https://8bituniverse.bandcamp.com/track/harder-better-faster-stronger-8-bit-tribute-to-daft-punk ::Playlists For Channel:: Latest Cool Worlds Videos ► http://bit.ly/NewCoolWorlds 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 Instagram https://www.instagram.com/cool.worlds THANKS FOR WATCHING!!

Humans are believed to be the most technologically advanced civilization that’s ever set foot on Earth, or really anywhere in the Solar System. But are we the first? Could there have been an advanced civilization that walked the Earth millions or even billions of years ago, and then died out long ago, their technology and structures lost to the eons. And how could we know? Audio Podcast version: ITunes: https://itunes.apple.com/us/podcast/universe-today-guide-to-space-audio/id794058155?mt=2 RSS: https://www.universetoday.com/audio Video Podcast version: ITunes: https://itunes.apple.com/bh/podcast/universe-today-video/id794057165?mt=2 RSS: https://www.universetoday.com/video What Fraser's Watching Playlist: https://www.youtube.com/playlist?list=PLbJ42wpShvmkjd428BcHcCEVWOjv7cJ1G Weekly email newsletter: https://www.universetoday.com/newsletter 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 References: https://arxiv.org/pdf/1704.07263.pdf https://arxiv.org/pdf/1804.03748.pdf https://www.theatlantic.com/science/archive/2018/04/are-we-earths-only-civilization/557180/ https://arxiv.org/pdf/1111.1212.pdf

The possibility that ancient civilizations might have encountered or even been influenced by extraterrestrials has fascinated us for as long as we knew there were distant suns they might visit from. Today we will examine the evidence and consider the numerous scenarios form the perspective of the Fermi Paradox, to see how reasonable the Ancient Aliens hypothesis is, and ask if the evidence of UFOs visiting us in the past is credible. Visit our Website: http://www.isaacarthur.net Support us on Patreon: https://www.patreon.com/IsaacArthur SFIA Merchandise available: http://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/v5UKTsz Listen or Download the audio of this episode from Soundcloud: Episode's Audio-only version: https://soundcloud.com/isaac-arthur-148927746/ancient-aliens Episode's Narration-only version: https://soundcloud.com/isaac-arthur-148927746/ancient-aliens-narration-only Credits: Ancient Aliens & the Fermi Paradox Season 4, Episode 22 Writers: Isaac Arthur Editors: Darius Said Edward Nardella Jerry Guern Keith Blockus Mark Warburton Matthew Campbell Producer: Isaac Arthur Cover Artist: Jakub Grygier https://www.artstation.com/jakub_grygier Graphics Team: Isaac Arthur Jeremy Jozwik Ken York Kristijan Tavar Narrator: Isaac Arthur Music Manager: Luca De Rosa - [email protected] Music: Martin Rezny, "Lifelight" https://soundcloud.com/martin-re-n-1 Aerium, "Windmill Forests" https://www.youtube.com/channel/UCRnUJY3l5vIJFGsY3XvW4dQ Phase Shift, "Enigmatic" https://www.last.fm/music/Phase+Shift/_/Enigmatic Chris Zabriskie, "There's Probably No Time" http://chriszabriskie.com Lombus, "Hydrogen Sonata" https://lombus.bandcamp.com

Subscribe to Naked Science – http://goo.gl/wpc2Q1 Did comets bring water, organic material, or even life itself to Earth? Panspermia is the controversial hypothesis that life exists throughout the Universe, distributed by meteoroids, asteroids, comets, planetoids, and also by spacecraft in the form of unintended contamination by microorganisms. Clip taken from the Naked Science documentary “Comets”. Watch it here – Coming soon!

An exploration of whether galaxy spanning empires are feasible or not as a solution to the Fermi Paradox. https://www.patreon.com/johnmichaelgodier Music: Cylinder Eight 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/ 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/ Space X-plorers Kevin MacLeod (incompetech.com) Licensed under Creative Commons: By Attribution 3.0 License http://creativecommons.org/licenses/by/3.0/

A group of scientists has claimed that octopuses came from outer space.

In this week's questions show, the viewers try to suggest names for balloon rockets. Could live from Venus escaped to Earth? Is the Fermi Paradox really a paradox when we've only explored a little bit of the galaxy? And More Audio Podcast version: ITunes: https://itunes.apple.com/us/podcast/universe-today-guide-to-space-audio/id794058155?mt=2 RSS: https://www.universetoday.com/audio Video Podcast version: ITunes: https://itunes.apple.com/bh/podcast/universe-today-video/id794057165?mt=2 RSS: https://www.universetoday.com/video What Fraser's Watching Playlist: https://www.youtube.com/playlist?list=PLbJ42wpShvmkjd428BcHcCEVWOjv7cJ1G Weekly email newsletter: https://www.universetoday.com/newsletter 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 Omar Ismail Hi Fraiser. Do you think its possible for intelligent life to have started out on venus when the sun was cooler and it had liquid water and as it heated up been forced to move to earth as the runaway greenhouse effect took hold and theres no remnants of it coz of the pressure and heat? YX Yang Come on, you can’t just call it a paradox when you only examined 0.000017% of the galaxy. Jim Becker Fraser: I just read your article in Universe Today titled "Breathing lunar dust could give astronauts bronchitis and even lung cancer" and would like to know if those same conditions could cause problems for astronauts that go to Mars ? Rudi von Staden Why not have caesar dock with ISS to return the sample? Seems having the sample packaged in a separate reentry vehicle is both risky and expensive. Or would the physics of matching the velocities of caesar and the ISS be too complicated? Michael Arsenault Can we grab asteroids and bring them back to earth for a controlled entry to a desert somewhere? Or is this too dangerous due to contamination of the atmosphere? Roxane Urmanski I really love your Q&A episodes; I learn all sorts of things I've never thought of. Anyways, of all the videos I've seen about humans living on Mars, I don't think it's ever been mentioned that they need some sort of plan for the moons. What will happen when Diemos leaves and Phobos smashes into Mars? eric thatcher Hi Fraser, Great vids as usual. If we wanted to terraform Venues using an asteroid to create a global winter how big would it need to be. Also might need to speed up it rotation to create an earth like environment. White Dinosaur Why not launch from a high mountain ? ozdergecko Yesterday (!) Greg&Mitch (ASAPscience) gave the actual estimated numbers on incoming and outgoing matter. It's 40,000 metric tons in and 95,000 out. Twirlip Of The Mists I don't get the interest in lava tubes. More work and more exotic technology are needed than just digging a trench, dropping a hab into the trench, and covering the trench. Even a gigantic trench is easier. Safer, too. Lava tubes will make good short term (weeks, months) campsites for explorers who can't bring bulldozers. Better to build permanent sites from scratch. Star Butterfly How far does gravity reach? Am i correct to believe it's infinite? Say we had an empty non moving universe. If we were to place two galaxies say 20 billion light years apart with no motion in relation to one another would they eventually over billions or trillions of years drift closer together? Casey Chapman Finally... It’s good to hear someone else state what I’ve been saying for years! Why spend all the effort climbing out of your home gravity well, just to throw yourself into another, probably less hospitable one?!? You want humanity to spread out, start mass production of O’Neil cylinders with material mind from the moon and asteroids. I figure that that’ll give us a better backup than planting bucketloads of people on Mars. Go to Mars, to explore and search for signs of past or present life, but do it from orbit using telepresence. Hell, build a giant spacecraft with a rotating section, a NIRVA or VASIMR engine and a few hundred scientists aboard to explore the entire solar system... it’s five year mission to seek out new life and new civi... (ummm comets?) to boldly go were on one has gone before! (Except a few robotic missions of course!) Sorry... geek moment.

Earth can be a really loud place if you’re searching for an extraterrestrial signal. So how does SETI sift through all the cosmic noise to hunt for alien signals? How Eyes Evolved to See the World Differently https://www.youtube.com/watch?v=zsuSfkr3I10&t=134s Subscribe now! https://www.youtube.com/user/DNewsChannel Read More: Finding Artificial Signals: Lights in the Dark https://seti.berkeley.edu/listen/research.html “Finding extraterrestrial intelligence ought to be easy. Simply point a sensitive radio detector at the sky, and look for narrow-band signals. Unfortunately, it’s not that easy. Radio frequencies are full of artificial signals generated by humans, many of which look very similar to the kinds of signals SETI experiments are trying to detect.” Scientists Hear Two Even More Ancient Black Holes Collide https://www.smithsonianmag.com/science-nature/gravitational-waves-even-more-ancient “Hypothesized by Einstein a century ago, the identification of these ripples in space-time – for the third time, no less – is fulfilling the promise of an area of astronomy that has enticed scientists for decades, but had always seemed to lie just out of our reach.” There Actually Is Sound in Outer Space https://gizmodo.com/there-actually-is-sound-in-outer-space-1738420340 “You’ve heard it before: In space, no one can hear you scream. That’s because sound doesn’t move through a vacuum, and everyone knows that space is a vacuum. The thing is, that’s not completely true.” ____________________ 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/ Subscribe now! https://www.youtube.com/user/DNewsChannel Seeker on Twitter http://twitter.com/seeker Seeker on Facebook https://www.facebook.com/SeekerMedia/ Seeker http://www.seeker.com/

The weirdest space story is about a star named, Tabby, whose bizarre blinking can't be explained. Stream Full Episodes Now: https://www.sciencechannel.com/ Download the Science Channel GO app! Subscribe to Science Channel: http://bit.ly/SubscribeScience Facebook: https://www.facebook.com/ScienceChannel Twitter: https://twitter.com/ScienceChannel

An exploration of the ramifications of an infinite universe on the prospects of alien life. https://www.patreon.com/johnmichaelgodier Music: Cylinder Eight 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/

An exploration of the idea that we may be among the first civilizations to appear in the universe, but in the future there may be many more. www.patreon.com/johnmichaelgodier Papers: "Relative Likelihood for Life as a Function of Cosmic Time", Loeb et al, 2016 https://arxiv.org/pdf/1606.08448v2.pdf Music: Cylinder Eight 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/

Night Sky Network members joined us on April 25, when Dr. Bruce Damer and Prof. David Deamer from NASA's Astrobiology Institute shared the latest research into the origins of life in the universe. In recent years, an approach to the long standing question of "how did life begin?" has returned to Charles Darwin's original intuition of "a warm little pond". Evidence from chemistry, geology and complexity science is accumulating to support a beginning for life on Earth, over four billion years ago, in fluctuating hot spring pools. Dr. Damer and Prof. Deamer will outline their new scenario and take us out into the solar system to Mars, Enceladus and beyond to exoplanets to address how this might inform our search for evidence life in the universe.

Astronomers have been looking for signs of extraterrestrial signals for decades, and not yet found any. Today we will examine the notion of Interstellar Beacons and ask just how far away you can be heard if you want to be. Visit our Website: http://www.isaacarthur.net Support us on Patreon: https://www.patreon.com/IsaacArthur SFIA Merchandise available: http://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. Listen or Download the audio of this episode from Soundcloud: Alien Beacons Audio-only version: https://soundcloud.com/isaac-arthur-148927746/alien-beacons Alien Beacons Narration-only version: https://soundcloud.com/isaac-arthur-148927746/alien-beacons-narration-only Credits & Notes: Alien Beacons Season 4, Episode 17 Writers: Isaac Arthur Editors: Darius Said Edward Nardella Keith Blockus Jerry Guern Mark Warburton Sigmund Kopperud Producer Isaac Arthur Cover Artist Jakub Grygier https://www.artstation.com/artist/jakub_grygier Graphics Team: Jarred Eagley Jeremy Jozwik Justin Dixon Luuk Warringa Nick Nieuwoudt Sergio Botero: https://www.artstation.com/sboterod?fref=gc Narrator: Isaac Arthur Music Manager: Luca De Rosa - [email protected] Music: Markus Junnikkala, "Mobilize The Fleets" https://www.markusjunnikkala.com/ Aerium, "2 Drowned Holodecks" https://www.youtube.com/channel/UCRnUJY3l5vIJFGsY3XvW4dQ Denny Schneidemesser, "Echoes" https://soundcloud.com/denny-schneidemesser Miguel Johnson, "Alone in the Dark" https://soundcloud.com/migueljohnsonmjmusic Dan Macleod, "The End" https://neptuneuk.bandcamp.com/track/imperium Markus Junnikkala, "They Muddy the Water" Aerium, "Parks" Denny Schneidemesser, "Acervus Vastatio"

Consider supporting Space Fan News: https://patreon.com/DeepAstronomy to ensure you get current space & astronomy news each week! In this episode, on this day of the momentous second data release of the Gaia spacecraft, astronomers from the University of Uppsala in Sweden have been working on a way to find Dyson Spheres and other megastructures that may be around other stars in our galaxy that would provide our first confirmation of other civilizations in the Milky Way Galaxy. Paper "SETI WITH GAIA: THE OBSERVATIONAL SIGNATURES OF NEARLY COMPLETE DYSON SPHERES" https://arxiv.org/pdf/1804.08351.pdf Dyson Sphere Art by Adam Burn: https://adamburn.deviantart.com/art/SHield-World-Construction-118068881 Gaia DR2 Video: https://www.youtube.com/watch?v=VINs-JcNmKs Space Fan News Theme by Stephen Dubois available for download here: http://ancienteyesmusic.com Space Fan News Background Music by Colour the Landscapes: https://colourthelandscapes.bandcamp.com/ Follow DeepAstronomy on Twitter: @DeepAstronomy Like DeepAstronomy on Facebook: https://www.facebook.com/DeepAstronomy/ Like Space Fan News on Facebook: https://www.facebook.com/SpaceFanNews/

Life does not need to many conditions to exist, in fact there might be life forms in the Solar System right now outside of the Earth. So how many are there aliens in the observable universe? In this video i give my estimate on the number of aliens. My twitter: https://twitter.com/Dreksler_Astral Intro, outro and other clips in the video were made with Space Engine. Music: 1. Event Departure - Silent Partner 2. Space Coast - Topher Mohr and Alex Elena

Earthlings have been unsuccessful in the ongoing quest to find aliens from outer space. Here are three scary possibilities for why that has been the case.

Consider supporting Space Fan News: https://patreon.com/DeepAstronomy to ensure you get current space & astronomy news each week! New observations of two supernovae: The Crab Nebula and Cassieopia A show wildly differing amounts of a vital component for life to thrive: Phosphorus. A team of astronomers from the University of Cardiff in Wales have measured these two supernovae in an attempt to find out how Phosphorus was distributed throughout the galaxy. What they found was surprising and rather bad news for those of us hoping to find a galaxy teeming with life. Space Fan News Theme by Stephen Dubois available for download here: http://ancienteyesmusic.com Space Fan News Background Music by Colour the Landscapes: https://colourthelandscapes.bandcamp.com/ Follow DeepAstronomy on Twitter: @DeepAstronomy Like DeepAstronomy on Facebook: https://www.facebook.com/DeepAstronomy/ Like Space Fan News on Facebook: https://www.facebook.com/SpaceFanNews/

Earthlings have been hard at work looking for alien life, but a recent study suggests that there may not be much of it to find.

Scientists say there could be possible microbial life in the atmosphere of Venus.

An exploration of the concept of a pulsar ring and a broader discussion of Dyson Spheres and potential SETI detections of them and a possible solution to the Fermi Paradox. https://www.patreon.com/johnmichaelgodier Papers: "IRAS-based Whole-Sky Upper Limit on Dyson Spheres " Carrigan, 2009 https://arxiv.org/pdf/0811.2376.pdf "Are the Dyson rings around pulsars detectable?" Osmanov, 2017 https://arxiv.org/pdf/1705.04142.pdf "On the search for artificial Dyson-like structures around pulsars", Osmanov, 2016 https://www.cambridge.org/core/journals/international-journal-of-astrobiology/article/on-the-search-for-artificial-dysonlike-structures-around-pulsars/F81897B07199173A573226D4DC8B77A7 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/

An exploration of scenarios within scientific possibility of why aliens might choose to invade earth. https://www.patreon.com/johnmichaelgodier 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/ Cylinder Seven 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/ Cylinder Three 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/ Darkest Child by Kevin MacLeod is licensed under a Creative Commons Attribution license (https://creativecommons.org/licenses/by/4.0/) Source: http://incompetech.com/music/royalty-free/index.html?isrc=USUAN1100783 Artist: http://incompetech.com/ Space X-plorers Kevin MacLeod (incompetech.com) Licensed under Creative Commons: By Attribution 3.0 License http://creativecommons.org/licenses/by/3.0/

Scientists have discovered a flare off of the sun’s closest stellar neighbor, Proxima Centauri. Many are reporting that it could spell trouble for any hope for life on its exoplanet, Proxima b—but it might also kill off a presumed set of other planets around the star. Last fall, lots of folks, including me, reported on evidence of dust rings around Proxima Centuari. These potential rings would imply that the star could have an elaborate planetary system alongside its confirmed exoplanet, Proxima b. https://gizmodo.com/giant-flare-around-proxima-centauri-may-kill-hope-for-p-1823366240 http://www.wochit.com This video was produced by YT Wochit News using http://wochit.com

If aliens do exist, theoretical physicist Michio Kaku posits, why would they want anything to do with us? It would be like a hunter talking to a squirrel, he suggests, and he has a great point. Hollywood and science fiction novels have conditioned us for years to believe that aliens either want to hang out on our intellectual level and learn from us... or destroy us. If alien life really does have the technology and know-how to make it all the way here, perhaps we should just play it cool and not assume that we are the top species in the universe. Read more at BigThink.com: http://bigthink.com/videos/michio-kaku-michio-kaku-lets-not-advertise-our-existence-to-aliens Follow Big Think here: YouTube: http://goo.gl/CPTsV5 Facebook: https://www.facebook.com/BigThinkdotcom Twitter: https://twitter.com/bigthink We have this mental image that a flying saucer will circle the White House lawn, land on the White House lawn and give us a bounty of all sorts of technological goodies to initiate an age of Aquarius on the planet earth. Personally, I don’t think that’s going to happen. For example, if you’re in the forest do you go out and talk to the squirrels and the deer? Maybe you do for a while, but after a while, you get bored because they don’t talk back to you because they have nothing interesting to tell you because they can’t relate to our values and our ideas. If you go down to an anthill do you go down to the ants and say I bring you trinkets; I bring you bees; take me to your aunt queen; I give you nuclear energy. So I think for the most part the aliens are probably not going to be interested in us because we’re so arrogant to believe that we have something to offer them. Realize that they could be thousands, maybe millions of years ahead of us in technology and they may have no interest in interacting with us in the same way that we don’t necessarily want to deal with the squirrels and the deer in the forest. Now some people say that we should not try to make contact with them because they could be potentially dangerous. For the most part, I think they’re going to be peaceful because they’ll be thousands of years ahead of us, but we cannot take the chance. So I personally believe that we should not try to advertise our existence to alien life in outer space because of the fact that we don’t know their intentions.

Use my link http://www.audible.com/isaac or text isaac to 500-500 to get a FREE audiobook and 30-day free trial! The idea that alien civilizations may exist but be hiding or asleep is a popular explanation for the Fermi Paradox, the apparent contradiction between the immensity of the Universe and the seeming absence of civilizations in it. Today we exam the concept that civilization may hibernate and what their motives for doing so would be. Visit our Website: http://www.isaacarthur.net Join the Facebook Group: https://www.facebook.com/groups/1583992725237264/ Support the Channel on Patreon: https://www.patreon.com/IsaacArthur Visit the sub-reddit: https://www.reddit.com/r/IsaacArthur/ Listen or Download the audio of this episode from Soundcloud: https://soundcloud.com/isaac-arthur-148927746/fermi-paradox-sleeping-giants Cover Art by Jakub Grygier: https://www.artstation.com/artist/jakub_grygier Graphics Team: Edward Nardella Jarred Eagley Justin Dixon Katie Byrne Kris Holland of Mafic Stufios: www.maficstudios.com Misho Yordanov Pierre Demet Sergio Botero: https://www.artstation.com/sboterod?fref=gc Stefan Blandin Script Editing Andy P Christian Leichsenring Edward Nardella Finrod Felagund Gregory Leal Keith Blockus Konstantin Sokerin Matthew Acker Mark Warburton N Kern Sigmund Kopperud Music Supervisor Luca De Rosa Music: Ender Guney, "Big Gun Epic" Kai Engel, "Daedalus" "Ross Bugden, "Interstellar" Dexter Britain, "Going Under" Chris Zabriskie, "Cylinder Nine" Phase Shift, "Forest Night" Kai Engel, "Crying Earth" Markus Junnikkala, "Course Set To Intercept" Martin Rezny, "Lifelight"

Elon Musk, CEO of Spacex and Tesla talks about aliens. Subscribe for daily Elon Musk videos.

Reupload to fix an audio issue. Assessing the possibility of visitation. Hosted by Seth Shostak and Molly Bentley. It was a shocker of a story, splashed across the New York Times front page: The existence of a five-year long, hidden Pentagon investigation of UFOs. With one-third of the American public convinced that aliens are visiting Earth, could this study finally provide the proof? We consider how this story came to light and what the $22 million program has produced. Does the existence of a secret study mean there’s now decent proof of extraterrestrial craft in our skies? We take a look at the evidence made public so far. And why, six years after the study ended, are we learning about it now? Guests: James Oberg http://www.jamesoberg.com/ - Space journalist, historian and former NASA employee James McGaha https://www.centerforinquiry.net/speakers/mcgaha_james - Retired Air Force pilot, astronomer and director of the Grasslands Observatory Ben Radford http://benjaminradford.com/ - Deputy editor of Skeptical Inquirer magazine and a Research Fellow with the Committee for Skeptical Inquiry Descripción en español http://musingsfromthecosmicshore.net/?p=2052 Download audio: http://radio.seti.org/episodes/skeptic-check-new-ufo-evidence Hosted by Seth Shostak and Molly Bentley, The Big Picture Science radio show and podcast engages the public with modern science research through lively and intelligent storytelling. Science radio doesn’t have to be dull. The only dry thing about our program is the humor. Read more at http://radio.seti.org/episodes/about_the_show Follow Big Picture Science in the Twitterverse https://twitter.com/BiPiSci ©2018 SETI Institute. All Rights Reserved 189 Bernardo Ave, Suite 200, Mountain View, CA 94043 Phone 650.961.6633

An exploration into the concept of alien invasion and reasons why aliens would not attempt to invade earth. https://www.patreon.com/johnmichaelgodier Music: Darkest Child by Kevin MacLeod is licensed under a Creative Commons Attribution license (https://creativecommons.org/licenses/by/4.0/) Source: http://incompetech.com/music/royalty-free/index.html?isrc=USUAN1100783 Artist: http://incompetech.com/ Cylinder Eight 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/ 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/

Guest speaker: Dr Charley Lineweaver When we look at the starry sky we cannot help wonder whether we are alone in the universe or whether other sentient beings exist, and if so how far away they are. Maybe the light reflected off our planet and old radio transmissions have travelled through the enormous distances of space and reached intelligent beings, who may also be wondering whether there is life here. Presently we do not have the technology to travel far outside of the solar system and check this out for ourselves, but since time immemorial philosophers have been debating whether we are the only intelligent species in the universe, while scientists have devised experiments to detect signs of life outside of Earth. In this keynote address, we’ll hear from one of the topmost Australian researchers in the field of astrobiology what we have learned so far, and will be treated to a thought-provoking travel through time and space to answer the ultimate question: are we alone? Dr Charles (Charley) Lineweaver is the convener of the Planetary Science Institute (PSI) of the Australian National University (ANU), where he holds a joint Associate Professorship in the Research School of Astronomy and Astrophysics, and the Research School of Earth Sciences. He obtained his PhD from the University of California at Berkeley, where he was a member of the COBE satellite team that discovered temperature fluctuations in the cosmic microwave background. His current research ranges from cosmology, to exoplanetology, astrobiology and evolutionary biology.

The first 688 people to use this link will get 20% off their annual membership: http://brilliant.org/nutshell Thanks a lot to Brilliant for supporting this channel. Finding alien life on a distant planet would be amazing news - or would it? If we are not the only intelligent life in the universe, this probably means our days are numbered and doom is certain. Kurzgesagt Newsletter: http://eepurl.com/cRUQxz Support us on Patreon so we can make more videos (and get cool stuff in return): https://www.patreon.com/Kurzgesagt?ty=h Kurzgesagt merch: http://bit.ly/1P1hQIH The MUSIC of the video: Soundcloud: http://bit.ly/2rVtfvh Bandcamp: http://bit.ly/2DTeVc9 Facebook: http://bit.ly/2qW6bY4 THANKS A LOT TO OUR LOVELY PATRONS FOR SUPPORTING US: Jacob Palmer, Hugh Lynch, Jonathan Fritz, Max Schäfer, Christopher Lam, Gabriel Ming, Shawn Walsh, Christopher Siefe, ronald biggs, Noah Kriwat, Matt Meier, Eugene Chiong, Victor L., Neo Kimoto, Paavan Vasudev, Barrett Jay, Jeremy Auvray, Billy Earley, BlackSlime, Brian Santero, Eden Issier, klio, Jackson McLaughlin, Max Schumacher, Poker Chen, Scott Fitzhugh, Daniel Lima, Joseph Morris, Ashley Wright, Magesh, Carcajou Carbonneau, TheRedSnail, Peter Lindeberg, Christian Jipa, Dennis Latyshev, Peter Uran, Brennen, Ian Kirk, Ivaylo, Marilyn Wright, Igor Pavlenko, Diana-Alina Olaru, Ismael, Kat Lynch, Paul Watson, Jude Rigatoni, Neal Strong, MrWilliamDeathEsq, Simon Sardeson-Coe, shinnosuke goto, Matthew Melillo, Eboni Lowe, Erik Heemskerk, Glenn Willen, Paul Wood, Evie Blackwell, Emily Dingwell, Gerrit, Peder Aaby, Chris Lyons, Mary Wright, Scott Rowland, Rasmus Larsson, Jesus Sanchez, Blake Buettner, McEckett, André Abdom, Assaf Horovitz, Andrei Bucur, Leon Taubitz, Inkwell, Robert Wahl, Hosu Lee, Nathan Casados, Logan Johnson, Novita Sari, Jérôme Armengol, Matthew, William Moffat, Carl Reeverts, David Woo, Thomas Bjerre, Hugues Boisvert, Shawn Walton, George Thaxton, Matthew Dyet, Simon Wöhrer, Andy Nguyen, Roberto Gudiño, James Forrester, Nate Borland, Stefan Gauntlett, Christopher Burke, Damian Wiercioch, David Newman, Yolan Chériaux, Eric Marandon, Jason Hammond, Stephanie, Basile Nkeng, David Voesten, Rodrigo Gomez, Jeffrey Barber, Hiram Rogers, Chip Leibovich, François Temporel, Felipe Medeiros, Roland Deml, Josef Roupec, Filip Procházka, James, Axel Labeau, Tanguy Roué, Alexandre Courtemanche, Boris Matešin, MightEMatt, Cody Towner, Stephen Fletcher, Cramus, Sebastian Holc, Jacob Parry, Miggs Perez, Kim Selig, David Adams, Joshua Hopkins-DeSantis, Ameen Aqeel, Lauren Weislak, Kurzgesagt fan, Samuel Martin, Marian Bielcik, blake novak, Alex Au, Michael Duffy, Bakor Al-Tayar, Mark Ritterhoff, Tommy Alsemgeest, Geoffrey Lehr, Matt Carrier, Jason Ross, Ahmad Game, Alan Bandurka, Kevin Cooper, Sinuce, Jack Wilson, Chris Roadfeldt, Tasia Pele, Jared Sirmans, Viktor Stanchev, Dimitry Ivanov, Tom Shoolbraid Help us caption & translate this video! http://www.youtube.com/timedtext_cs_panel?c=UCsXVk37bltHxD1rDPwtNM8Q&tab=2 Why Alien Life Would be our Doom - The Great Filter

The supertelescopes are coming, enormous ground and space-based observatories that’ll let us directly observe the atmospheres of distant worlds. We know there’s life on Earth, and our atmosphere tells the tale, so can we do the same thing with extrasolar planets? It turns out, coming up with a single biosignature, a chemical in the atmosphere that tells you that yes, absolutely, there’s life on that world, is really tough. Sign up to my weekly email newsletter: https://www.universetoday.com/newsletter 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 References: http://www.spitzer.caltech.edu/images/1794-ssc2007-09a1-First-Map-of-an-Exoplanet-Atmosphere http://www.spitzer.caltech.edu/news/1950-ssc2017-06--Warm-Neptune-Has-Unexpectedly-Primitive-Atmosphere https://www.nasa.gov/feature/goddard/2017/probing-seven-worlds-with-nasas-james-webb-space-telescope https://arxiv.org/ftp/arxiv/papers/1710/1710.03976.pdf I’ve got to admit, I’ve been pretty bad for this in the past. In old episodes of Astronomy Cast and the Weekly Space Hangout, even here in the Guide to Space, I’ve said that if we could just sample the atmosphere of a distant world, we could say with conviction if there’s life there. Just detect ozone in the atmosphere, or methane, or even pollution and you could say, “there’s life there.” Well, future Fraser is here to correct past Fraser. While I admire his naive enthusiasm for the search for aliens, it turns out, as always, things are going to be more difficult than we previously thought. Astrobiologists are actually struggling to figure out a single smoking gun biosignature that could be used to say there’s life out there. And that’s because natural processes seem to have clever ways of fooling us. What are some potential biosignatures, why are they problematic, and what will it take to get that confirmation?

An exploration of the habitability of binary star systems and how SETI might search them for signals from intelligent alien life. https://www.patreon.com/johnmichaelgodier Papers: "Sharing the Universe: Perspectives on Extraterrestrial Life", Seth Shostak, 1998, Berkley Hills Books "Climate variations on Earth-like circumbinary planets", Popp and Eggl, 2017 https://www.nature.com/articles/ncomms14957 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/

We often think of colonizing or even terraforming a planet, but how about colonizing every planet in your galaxy, and not by spaceships but by self replicating machines. In this episode, we will be looking at von Neumann probes, discussing many reasons why you’d use them, tied in with the Fermi paradox. ►Click here to subscribe: https://www.youtube.com/channel/UCB0fFWQLZ2oj-FaoDUG_wow?sub_confirmation=1 ►Written, Produced & Narrated by: David ►Share this video: https://youtu.be/SEziF9P8ZZc Music: “Cylinder Five” by Chris Zabriskie “A Memory of Earth” by Markus Junnikkala

An exploration of ten of the most unsettling solutions to the Fermi Paradox, or the question of are we alone and if not, where are they? https://www.patreon.com/johnmichaelgodier Papers: "The Sustainability Solution to the Fermi Paradox", Haqq-Misra and Baum, 2009 https://arxiv.org/abs/0906.0568 Music: Cylinder Eight 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/ 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/ Cylinder Seven 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/

The Fermi paradox is the apparent contradiction between the sheer size and age of the Universe and the apparent absence of any other intelligent life besides ourselves. In this episode, we will be looking at intelligent aliens or technologically advanced civilizations, tied in with the Fermi paradox. ►Click here to subscribe: https://www.youtube.com/channel/UCB0fFWQLZ2oj-FaoDUG_wow?sub_confirmation=1 ►Written, Produced & Narrated by: David ►Share this video: https://youtu.be/-e5caC9eeoY Music: “A Memory of Earth” by Markus Junnikkala “Staring Through” by AJ Prasad

We tend to assume that life began here on Earth. But it’s possible that life originated on an alien world and in some form or another was brought here. In this video, we discuss the possibility that life originated somewhere else, either on a planet or asteroid, then spawned life here on Earth. ►Click here to subscribe: https://www.youtube.com/channel/UCB0fFWQLZ2oj-FaoDUG_wow?sub_confirmation=1 ►Written, Produced & Narrated by: David ►Share this video: https://youtu.be/PjnWOBext-E Music: “Cylinder Five” by Chris Zabriskie “A Memory of Earth” by Markus Junnikkala

Tabby's Star, or KIC 8462852, took the internet by storm when it was speculated that it could be the home of an alien megastructure. But recent research seems to shed more light on the mystery. Check out the TED talk by Tabetha Boyajian here: https://www.youtube.com/watch?v=gypAjPp6eps Get your I Want To Believe shirt at: http://www.answerswithjoe.com/shirts Support me on Patreon! http://www.patreon.com/answerswithjoe Follow me at all my places! Instagram: https://instagram.com/answerswithjoe Snapchat: https://www.snapchat.com/add/answerswithjoe Facebook: http://www.facebook.com/answerswithjoe Twitter: https://www.twitter.com/answerswithjoe LINKS LINKS LINKS: SciShow Space on Tabby's Star: https://www.youtube.com/watch?v=ULF_sn6vy54 Isaac Arthur on Tabby's Star: https://www.youtube.com/watch?v=SVCpBr3fxdE Seeker on Tabby's Star: https://www.youtube.com/watch?v=8XDS_aTVBrE

SPACE — Scientists say they now have an explanation for why Tabby's Star flickers — space dust. Subscribe to TomoNews ►►http://bit.ly/Subscribe-to-TomoNews TomoNews is your best source for real news. We cover the funniest, craziest and most talked-about stories on the internet. Our tone is irreverent and unapologetic. If you’re laughing, we’re laughing. If you’re outraged, we’re outraged. We tell it like it is. And because we can animate stories, TomoNews brings you news like you’ve never seen before. Ultimate TomoNews Compilations - Can't get enough of TomoNews? Then this playlist is for you! New videos are added each day http://bit.ly/Ulitmate_TomoNews_Compilations Top TomoNews Stories - A shortcut to the most popular videos on TomoNews! http://bit.ly/Top_TomoNews_Stories World News - Latest international headlines from around the world http://bit.ly/TomoNews_World_News Awww!!! Animals - All the best animal videos! Hungry hippos, tiger hairballs, giant pythons, and many more! http://bit.ly/Aw_Animals Connect with TomoNews! Like TomoNews on Facebook: http://www.facebook.com/TomoNewsUS Follow us on Twitter: @tomonewsus http://www.twitter.com/TomoNewsUS Follow us on Instagram: @tomonewsus http://instagram.com/tomonewsus Get your TomoNews merch today! http://bit.ly/tomonews-teespring Visit our official website for all the latest videos: http://us.tomonews.com Check out our Android app: http://bit.ly/1rddhCj Check out our iOS app: http://bit.ly/1gO3z1f Get top stories delivered to your inbox every day: http://bit.ly/tomo-newsletter

An exploration of supernovas as a precursor to alien contact transmissions. https://www.patreon.com/johnmichaelgodier Papers: "Supernovae as time markers in interstellar communication", T.B. Tang, 1976 https://www.researchgate.net/publication/234326464_Supernovae_as_time_markers_in_interstellar_communication "Long-Term Prospects: Mitigation of Supernova and Gamma-Ray Burst Threat to Intelligent Beings" Cirkovik and Vukotic https://arxiv.org/pdf/1611.06096v1.pdf 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/

An exploration of the other bodies in the solar system other than earth that might be habitable for some forms of alien life. https://www.patreon.com/johnmichaelgodier Music: Light Awash by Kevin MacLeod is licensed under a Creative Commons Attribution license (https://creativecommons.org/licenses/by/4.0/) Source: http://incompetech.com/music/royalty-free/index.html?isrc=USUAN1100175 Artist: http://incompetech.com/

During the summer of 1950, physicist Enrico Ferm posed a question to his colleagues over lunch, "Don't you ever wonder where everybody is?" Fermi was referring to alien life. In the 4.4 billion years it took a species capable of space travel to form on Earth, Fermi proposed that the galaxy should have been overrun with intelligent, technologically-advanced aliens. Yet, we have no evidence of this despite decades of searching. This conundrum became known as the Fermi Paradox. Scientists have proposed many theories over the decades, including planetary scientist, Alan Stern, who has the latest idea. Alan Stern: What my paper suggests is that it may be related to a fairly recent discovery of planetary science that most of the ocean worlds in our own solar system are interior to planets as opposed to our own planet where we have the oceans on the outside. And we think that oceans and water are necessary for the development of life as we know it, so perhaps, if these kinds of ocean worlds are common across the galaxy, and if that's where life most often develops. And if technological civilizations can actually develop in these interior ocean worlds, they would naturally be cut off from us because of the shell of rock and ice above their ocean. We wouldn't see their city lights. We wouldn't be able to hear their communication. They wouldn't maybe even know that there was a universe out there to communicate with. They probably would never develop space travel.  It's logical to think that ocean worlds, particularly these interior ocean worlds, are common across the galaxy. But I want to stress that we don't have evidence, direct evidence for that yet. There are actually many possible explanations proposed for Fermi Paradox. No one knows what the right answer is. Some examples are, perhaps the other civilizations aren't interested in communicating or perhaps they don't last very long, so although a lot of them, they come to exist, at any one time, there aren't very many. Hopefully, the scientific paper that I put together will help advance this a little bit and we'll see what turns out to be right.  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

Use my link http://www.audible.com/isaac or text isaac to 500-500 to get a FREE audiobook and 30-day free trial! The concept of Interstellar Empires has fascinated us for as long as we've know those stars in the night sky were other solar systems, and it's become a staple of science fiction. But rarely do we consider how realistic such galaxy-spanning confederations are, and what special challenges they'd face. Visit our Website: http://www.isaacarthur.net Join the Facebook Group: https://www.facebook.com/groups/1583992725237264/ Support the Channel on Patreon: https://www.patreon.com/IsaacArthur Visit the sub-reddit: https://www.reddit.com/r/IsaacArthur/ Listen or Download the audio of this episode from Soundcloud: https://soundcloud.com/isaac-arthur-148927746/interstellar-empires Cover Art by Jakub Grygier: https://www.artstation.com/artist/jakub_grygier Graphics Team: Edward Nardella Jarred Eagley Justin Dixon Katie Byrne Kris Holland of Mafic Stufios: www.maficstudios.com Misho Yordanov Pierre Demet Sergio Botero: https://www.artstation.com/sboterod?fref=gc Stefan Blandin Script Editing: Andy Popescu Connor Hogan Edward Nardella Eustratius Graham Gregory Leal Jefferson Eagley Keith Blockus Luca de Rosa Mark Warburton Michael Gusevsky Mitch Armstrong MolbOrg Naomi Kern Philip Baldock Sigmund Kopperud Tiffany Penner Music Markus Junnikkala, "Always tell me the odds" Sergey Cheremisinov, "Labyrinth" A.J. Prasad, "Aether" Kai Engel, "Snowfall" Aerium, "Fifth Star of Aldebaran" Markus Junnikkala, "Memory of Earth" Brandow Liew, "Into the Storm"

Scientists say an initial study shows no signs of alien technology on the mysterious interstellar object.