PBS Space Time
Space Time explores the outer reaches of space, the craziness of astrophysics, the possibilities of sci-fi, and anything else you can think of beyond Planet Earth with our astrophysicist host: Matthew O’Dowd. Matt O'Dowd spends his time studying the universe, especially really far-away things like quasars, super-massive black holes, and evolving galaxies. He uses telescopes in space to do it. Matt completed his Ph.D. at NASA's Space Telescope Science Institute, followed by work at the University of Melbourne and Columbia University. He's now a professor at the City University of New York's Lehman College and an Associate at the American Museum of Natural History's Hayden Planetarium.
Episodes
What is a Theory of Everything: Livestream
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July 28 @ 4pm Eastern (8pm UTC) - What is a Theory of Everything?
Moderated by Matt O'
The Crisis in Cosmology
PBS Member Stations rely on viewers like you. To support your local station, go to: http://to.pbs.org/DonateSPACE↓ More info below ↓Uploaded 24-01-19Check out the new Space Time Merch Store!https://pbsspacetime.com/Support Space Time on Patreonhttps://www.patreon.com/pbsspacetimeThe search for a single number: the hubble constant, which is the rate of expansion of our universe, has consumed astro
How Does The Nucleus Keep Together?
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What Caused the Big Bang?
PBS Member Stations rely on viewers like you. To support your local station, go to: http://to.pbs.org/DonateSPACE↓ More info below ↓Uploaded 06-08-19Check out the new Space Time Merch Store!https://pbsspacetime.com/Support Space Time on Patreonhttps://www.patreon.com/pbsspacetimeEvery astronomy textbook tells us that soon after the Big Bang, there was a period of exponentially accelerating expansi
What if Humans Are NOT Our Planet's First Civilization? | Silurian Hypothesis
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We’re almost certainly the first technological civilizatio
What Happens If A Black Hole Hits Earth?
Check Out Above The Noise: https://youtu.be/GKS3ph3G2jcUploaded 20-12-21Take the Space Time Fan Survey Here: https://forms.gle/wS4bj9o3rvyhfKzUAThe possibility that a black hole could actually impact Earth may seem straight out of science fiction, but the reality is that microscopic primordial black holes could actually hit Earth. If one did, it wouldn't just impact like an asteroid, it'd pass str
Does Axionic Dark Matter Fuse Galaxies Together?
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Quantum mechanics is our best theory of the fundamental nature of reality, but it's usually only distinguishable from familiar classical mechanics on the smallest scales. However, there ar
Are Axions Dark Matter?
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How To Build The Universe in a Computer
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Will Wormholes Allow Fast Interstellar Travel?
PBS Member Stations rely on viewers like you. To support your local station, go to: http://to.pbs.org/DonateSPACE↓ More info below ↓Uploaded 22-04-20Sign Up on Patreon to get access to the Space Time Discord! https://www.patreon.com/pbsspacetimeCheck out the Space Time Merch Storehttps://pbsspacetime.com/Sign up for the mailing list to get episode notifications and hear special announcements!https
Are Dark Matter And Dark Energy The Same?
PBS Member Stations rely on viewers like you. To support your local station, go to: http://to.pbs.org/DonateSPACE↓ More info below ↓Uploaded 09-01-19Check out the new Space Time Merch Store!https://pbsspacetime.com/Support Space Time on Patreonhttps://www.patreon.com/pbsspacetimeAstronomers are the worst at naming things. Dark energy AND dark matter? Who can remember which is which. But perhaps on
What Makes The Strong Force Powerful?
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Quantum mechanics gets weirder as you go to smaller sizes and higher energies. It’s strange enough for atoms, but
Why Antimatter Engines Could Blast Off In Your Lifetime
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Antimatter drives sound like science fiction, but they may not be as far as you think. There’s a version that could, just maybe, launch wit
Fermions Vs. Bosons Explained by Statistical Mechanics!
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If I roll a pair of dice and you get to bet on one number, what do you choose? The smart choice is 7 because there are
Did JWST EXPLAIN The Mystery of Supermassive Black Hole Origins?
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This is what we astronomers call a blob, or a smudge, if you want to get really technical. It may not look like much from here, but what do you expect for something near the literal edge of the observable universe. If you were there when this light was e
Our Antimatter, Mirrored, Time-Reversed Universe
PBS Member Stations rely on viewers like you. To support your local station, go to: http://to.pbs.org/DonateSPACE↓ More info below ↓Uploaded 16-01-19Check out the new Space Time Merch Store!https://pbsspacetime.com/Support Space Time on Patreonhttps://www.patreon.com/pbsspacetimeThe foundations of quantum theory rests on its symmetries. For example, it should be impossible to distinguish our unive
Can a Particle Be Neither Matter Nor a Force?
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All particles belong to two large groups: fermions like protons and elect
The Andromeda-Milky Way Collision
Viewers like you help make PBS (Thank you 😃) . Support your local PBS Member Station here: https://to.pbs.org/DonateSPACEUploaded 28-03-18The Andromeda galaxy is heading straight toward our own Milky Way. The two galaxies will inevitably collide. Will that be the very last night sky our solar system witnesses?You can further support us on Patreon at https://www.patreon.com/pbsspacetimeGet your own
Why Is The World Returning To The Moon So Quickly?
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The Moon has been one of the most important theoretical stepping stones to our understanding of the universe. We’ve long understood that it could also be our literal stepping stone: humanity’s first destination beyond our atmosphere.
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How Many Universes Are There?
PBS Member Stations rely on viewers like you. To support your local station, go to: http://to.pbs.org/DonateSPACE↓ More info below ↓Uploaded 30-09-19Sign Up on Patreon to get access to the Space Time Discord! https://www.patreon.com/pbsspacetimeCheck out the Space Time Merch Storehttps://pbsspacetime.com/The universe is big, but it’s peanuts compared to the eternally inflating multiverse. But just
Can The Crisis in Cosmology Be EXPLAINED By Cosmic Voids?
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Two of the greatest mysteries in cosmology are the nature of dark energy and the apparent conflict in our measurements of the expansion rate of the early versus the modern universe that even dark energy can’t account for. Could bo
The End of the Habitable Zone
Viewers like you help make PBS (Thank you 😃) . Support your local PBS Member Station here: https://to.pbs.org/DonateSPACEUploaded 24-01-18Learn through active problem-solving at Brilliant: https://brilliant.org/SpaceTime/ The Sun is getting brighter and the planets in our solar system that are habitable are changing. Check out Infinite Series at https://www.youtube.com/channel/UCs4aHmggTfFrpkPcWS
First Detection of Light from Behind a Black Hole
Thank you to Blinkist for supporting PBS. For more information and trial go to http://www.blinkist.com/PBSSpacetimeUploaded 07-09-21How do you see the unseeable - how do you explore the inescapable? Our cleverest astronomers have figured out ways to catch light that skims the very edge of black holes. Let’s find out what they learned.A few weeks ago a story made the rounds of pop-sci media procla
What If Humanity Ranks Among The First Spacefaring Civilizations?
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Supersymmetric Particle Found?
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How Decoherence Splits The Quantum Multiverse
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Do We Live in the Most Exceptional Solar System In The Universe? We're about to find out!
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There are lots of reasons to search for planets around other stars—exoplanets. A big one is to find other places in the universe that might harbor life. We only know of one such planet so far: Earth.
Do We Need an UPDATED Dark Matter Model?
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We have no idea what dark matter is, other than it’s some source of gravity that is completely invisible but exerts way more pull that all of the regular matter. More than all of the star
Citizen Science + Zero-Point Challenge Answer | Space Time
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The Unruh Effect
Viewers like you help make PBS (Thank you 😃) . Support your local PBS Member Station here: https://to.pbs.org/DonateSPACEUploaded 04-04-18Worried about black holes? Consider this: Every time you accelerate - you generate an event horizon behind you. The more you accelerate away from it the closer it gets. Don’t worry, it can never catch up to you, but the Unruh radiation it generates sure can.You
What If Dark Energy is an Undiscovered Quantum Field?
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What is Quintessence? Well we know that something is up with the way the universe is expanding - there’s some kind of anti-gravitational effect that’s causing the expansion to accelerate.
Does Many Worlds Justify Quantum Probabilities?
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Principle of Indifference Proof:
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The mystery of what happens when we go from a superposition to a definite s
Why Did Attosecond Physics Take Home the NOBEL PRIZE?
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Whenever we open a new window on the universe we discover something new. Whether it's figuring out how to see to gre
How Close To The Sun Can Humanity Get?
Viewers like you help make PBS (Thank you 😃) . Support your local PBS Member Station here: https://to.pbs.org/DonateSPACEUploaded 01-08-18Parker Space Probe successfully launched on August 12!!! http://parkersolarprobe.jhuapl.edu/Help Us with the PBS Digital Studios Survey: https://to.pbs.org/2018YTSurvey Check Out PBS ReInventors: http://youtube.com/pbsreinventorsYou can further support us on Pat
Why Magnetic Monopoles SHOULD Exist
Sign Up on Patreon to get access to the Space Time Discord!https://www.patreon.com/pbsspacetimeUploaded 05-10-21What happens if you cut a bar magnetic in half? We get two magnets, each with their own North and South poles. But what happens if you keep on cutting, into fourths and eighths and sixteenths and so on? Will we ever get to a single pole? I’ll spoil the answer for you: we don’t know! But
How Can Matter Be BOTH Liquid AND Gaseous State?
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Supercritical Fluids are one the strangest states of matter and yet they are found everywhere from Decaf Coffee, to dry
Is Gravity RANDOM Not Quantized?
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The holy grail of theoretical physics is to find the long-sought theory of quantum gravity. But what if this theory is as mythical as the grail of legend? What if gravity isn’t weirdly quantum at all, but rather … just a bit messy
Why Did Quantum Entanglement Secure the Nobel Prize in Physics?
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The Nobel prize in physics is typically awarded to scientists who make sense of nature; those whose discoveries render the univ
What If The Universe DID NOT Emerge From The Big Bang?
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Here’s the story we like to tell about the beginning of the universe. Space is expanding evenly everywhere, but if you rewind that expansion you find that all of space was once compacted in an infinitesimal point of infinite
Gravitational Wave Background Discovered?
PBS Member Stations rely on viewers like you. To support your local station, go to: http://to.pbs.org/DonateSPACE↓ More info below ↓Uploaded 17-02-21Check Out Overview on PBS Terra: https://youtu.be/Pgj95EntvW0Sign Up on Patreon to get access to the Space Time Discord! https://www.patreon.com/pbsspacetimeIt was pretty impressive when LIGO detected gravitational waves from colliding black holes. We
How Astrophysics Can (LITERALLY) Preserve Civilization
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Giant space rocks are definitely going to hit the Earth again. We actually do know how to deflect them, but only if we find them and correctly assess their risk. But the solar system is a chaotic place. How is it even possible to tell if a space rock will one day collide with the Earth?
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Your DNA's Codes Are (Almost Certainly) From Outer Space
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Did you know that many of us have up to 4% neanderthal DNA? And that 100% of your DNA may come from outer space? No joke. The biochemistry that defined the coding system of your DNA may have happened off-world, and perhaps even long before Earth existed.
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Can Viruses Travel Between Planets?
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Kronos: Devourer Of Worlds
Viewers like you help make PBS (Thank you 😃) . Support your local PBS Member Station here: https://to.pbs.org/DonateSPACEUploaded 31-01-18What happens when a star eats its planets? Find out on today’s Space Time Journal Club.You can further support us on Patreon at https://www.patreon.com/pbsspacetimeGet your own Space Time tshirt at http://bit.ly/1QlzoBiTweet at us! @pbsspacetimeFacebook: facebo
How Luminiferous Aether Led to Relativity
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What If Space is NOT Hollow?
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Spacetime on its smallest scales is a seething ocean of black holes and wormholes flickering into and out of exis
Did JWST Identify Dark Matter Stars?
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We knew that the James Webb Space Telescope would find interesting stuff, especially about the mysterious early times.
Are there Infinite Versions of You?
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How Are Quasiparticles Separate From Particles?
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The device you’re watching this video on is best understood by thinking about positive and negative ch
Why Quantum Information is Never Destroyed
Viewers like you help make PBS (Thank you 😃) . Support your local PBS Member Station here: https://to.pbs.org/DonateSPACEUploaded 23-05-18If you have perfect knowledge of every single particle in the universe, can you use the laws of physics to rewind all the way back to the Big Bang? Is the entire history of the universe perfectly knowable? Or has information somehow lost along the way?You can fu
How An Extreme New Star Could Change All Cosmology
Sign Up on Patreon to get access to the Space Time Discord!https://www.patreon.com/pbsspacetimeUploaded 03-08-21A new white dwarf has been discovered (poetically named: ZTF J1901+1458) that’s doing some stuff that no white dwarf should ever be able to do. In fact, it has multiple properties that are so extreme that it almost certainly did NOT form in the way that we thought all white dwarfs formed
What If Charge is NOT Fundamental?
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What Survives Inside A Black Hole?
Viewers like you help make PBS (Thank you 😃) . Support your local PBS Member Station here: https://to.pbs.org/DonateSPACEUploaded 13-06-18You can get a free trial of The Great Courses Plus at http://ow.ly/c7tI30hIva3We’ve established by now that black holes are weird. The result of absolute gravitational collapse of a massive body: a point of hypothetical infinite density surrounded by an event ho
Will The Sun's Magnetic Poles Flip This Year?
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Solar activity is still increasing in a sunspot cycle that is proving way more intense than scientists predicted. Just how much stronger is it going to get?
Sig
Could Life Evolve Inside Stars?
PBS Member Stations rely on viewers like you. To support your local station, go to: http://to.pbs.org/DonateSPACE↓ More info below ↓Uploaded 21-09-20Take the PBS Digital Studios annual survey: http://to.pbs.org/2020surveyOne of the most bizarre proposals for life not as we know it doesn’t even use atoms. It proposes that fundamental kinks and defects in the fabric of the universe - cosmic strings
How Will the Universe End? | Space Time
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The Universe Itself Might Be Veiling the Gravity Particle From Us
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To progress to the next level in understanding reality, we need to combine quantum mechanics and Einstein’s general relativity. And to do that, most physicists believe we need a theory of quan
Why String Theory is Right
You can learn more about The Great Courses Plus here: http://ow.ly/3qDN30hIvdbUploaded 07-11-18Viewers like you help make PBS (Thank you 😃) . Support your local PBS Member Station here: https://to.pbs.org/DonateSPACESome see string theory as the one great hope for a theory of everything – that it will unite quantum mechanics and gravity and so unify all of physics into one glorious theory.You can
Is Our Model of Dark Energy BROKEN? | New 4.2σ Results
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The biggest news in cosmology in recent years is that the mysterious universe-accelerating entity we call dark energy may be fading away. The evidence for this is now strong enough that enormous effort is going into confirming this result. So what’s it going to take, and when are we going to know?
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What Transpires To Quantum Information Inside A Black Hole?
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Meet Alice and Bob, famous explorers of the abstract landscape of theoretical physics. Heroes of the gerdankenexperiment—the thought experiment—whose life mission is to find contradictions in the deepest layers of our theories. To
Could the Higgs Boson Point Us Toward Dark Matter?
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The discovery of the Higgs boson ten years ago in the Large Hadron Collider was the culmination of decades of work and the
Did AI Invalidate Our Proton Model WRONG?
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The humble proton may seem simple enough, and they’re certainly common. People are made of cells, cells are made of molecules, molecules are made of atoms, atoms are made of electrons, pro
Exploring Arecibo in VR 180
PBS Member Stations rely on viewers like you. To support your local station, go to: http://to.pbs.org/DonateSPACE↓ More info below ↓Uploaded 12-08-19This is a VR180 video so pop on your Google Cardboard or VR Headset to be totally immersed in our world! No headset? No problem. Move your mobile phone around and catch the total 180 experience. Have fun looking down from the catwalk! How can you buil
Perpetual Motion From Negative Mass?
PBS Member Stations rely on viewers like you. To support your local station, go to: http://to.pbs.org/DonateSPACE↓ More info below ↓Uploaded 30-01-19Check out the new Space Time Merch Store!https://pbsspacetime.com/Support Space Time on Patreonhttps://www.patreon.com/pbsspacetimeEmail your answers to: pbsspacetime@gmail.comWith the subject heading: Negative Mass Challenge QuestionChallenge questio
Mapping the Multiverse
PBS Member Stations rely on viewers like you. To support your local station, go to: http://to.pbs.org/DonateSPACE↓ More info below ↓Uploaded 18-05-20Sign Up on Patreon to get access to the Space Time Discord! https://www.patreon.com/pbsspacetimeCheck out the Space Time Merch Storehttps://pbsspacetime.com/Sign up for the mailing list to get episode notifications and hear special announcements!https
Understanding the Uncertainty Principle with Quantum Fourier Series | Space Time
Viewers like you help make PBS (Thank you 😃) . Support your local PBS Member Station here: https://to.pbs.org/DonateSPACEUploaded 06-12-17Sometimes intuitive, large-scale phenomena can give us incredible insights into the extremely unintuitive world of quantum mechanics. Sign up for your free trial of The Great Courses Plus at http://ow.ly/HAvT30beNAjToday the humble sound wave is going to open th
Could The Universe Be Inside A Black Hole?
Take the Space Time Fan Survey Here: https://forms.gle/wS4bj9o3rvyhfKzUAUploaded 30-03-22PBS Member Stations rely on viewers like you. To support your local station, go to:http://to.pbs.org/DonateSPACESign Up on Patreon to get access to the Space Time Discord!https://www.patreon.com/pbsspacetimeWhat is inside a black hole? Inevitable crushing doom? Gateways to other universes? Weird, multidimensio
How a One-in-a-Billion Blunder Made the Universe Possible
Huge thanks to KiwiCo for sponsoring today’s video! Go to https://www.kiwico.com/spacetime and use code SPACETIME for 50% off your first monthly crate
Check Out Reactions on the Earth Month Playlist
https://www.youtube.com/watch?v=fJFMP0_fhLQ&list=PLnNZYWyBGJ1F8ofFm4H9UTrHxqU8zngK4&index=2
At one-one-thousandth of a second after the Big Bang, the great annihilation event should have wiped out al
Does Quantum Immortality Save Schrödinger's Cat?
PBS Member Stations rely on viewers like you. To support your local station, go to: http://to.pbs.org/DonateSPACE↓ More info below ↓Uploaded 03-03-20Check out Antarctic Extremes on PBS Terra: https://www.youtube.com/watch?v=EvRAuy1ZmTcSign Up on Patreon to get access to the Space Time Discord! https://www.patreon.com/pbsspacetimeSign up for the mailing list to get episode notifications and hear sp
Quantum Gravity and the Hardest Problem in Physics | Space Time
Viewers like you help make PBS (Thank you 😃) . Support your local PBS Member Station here: https://to.pbs.org/DonateSPACEUploaded 20-09-18Between them, general relativity and quantum mechanics seem to describe all of observable reality. You can further support us on Patreon at https://www.patreon.com/pbsspacetimeGet your own Space Time t-shirt at http://bit.ly/1QlzoBiTweet at us! @pbsspacetimeFac
What If The Universe Is Arithmetic?
PBS Member Stations rely on viewers like you. To support your local station, go to:http://to.pbs.org/DonateSPACE
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In his essay “The Unreasonable Effectiveness of Mathematics”, the physicist Eugine Wigner said that “the enormous usefulness of mathematics in the natural sciences is something bordering o
The Holographic Universe Explained
PBS Member Stations rely on viewers like you. To support your local station, go to: http://to.pbs.org/DonateSPACE↓ More info below ↓Uploaded 10-04-19We live in a universe with 3 dimensions of space and one of time. Up, down, left, right, forward, back, past, future. 3+1 dimensions. Or so our primitive Pleistocene-evolved brains find it useful to believe. And we cling to this intuition, e
Year End Q&A
In this 2022 end of year, Ask Matt anything, Matt discussed the upcoming year ahead for Space Time, Black Holes, the problem with the question of free will, the nature of photons of light and more!
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Sound Waves from the Beginning of Time
PBS Member Stations rely on viewers like you. To support your local station, go to: http://to.pbs.org/DonateSPACE↓ More info below ↓Uploaded 07-02-19You can check out Google's Science Journal app at http://g.co/ScienceJournal Check out the new Space Time Merch Store!https://pbsspacetime.com/Support Space Time on Patreonhttps://www.patreon.com/pbsspacetimeEmail your answers to: pbsspacetime@gmail.c
Navigating with Quantum Entanglement
PBS Member Stations rely on viewers like you. To support your local station, go to: http://to.pbs.org/DonateSPACE↓ More info below ↓Uploaded 22-12-20Check Out Weathered on PBS Terrahttps://www.youtube.com/watch?v=znSN7ZFIaOg&ab_channel=PBSTerraSign Up on Patreon to get access to the Space Time Discord! https://www.patreon.com/pbsspacetimeWe often think of quantum mechanics as only affecting only t
Black Hole Harmonics
Learn more at https://www.brilliant.org/spacetime Uploaded 07-10-19PBS Member Stations rely on viewers like you. To support your local station, go to: http://to.pbs.org/DonateSPACEBlack holes are crazy enough on their own – but crash two together and you end up with a roiling blob of inescapable space that vibrates like a beaten drum. And the rich harmonics of those vibrations, seen through gravit
What If Dark Matter Is Just Black Holes?
PBS Member Stations rely on viewers like you. To support your local station, go to: http://to.pbs.org/DonateSPACE↓ More info below ↓Uploaded 13-04-21Sign Up on Patreon to get access to the Space Time Discord!https://www.patreon.com/pbsspacetimeIt may be that for every star in the universe there are billions of microscopic black holes streaming through the solar system, the planet, even o
The Nature of Space and Time AMA
Take the Space Time Fan Survey Here: https://forms.gle/wS4bj9o3rvyhfKzUA
On February 10th, 5pm EST Matt will answer the space time community's top questions on the nature of space and the nature of time!
Questions are being pulled from the community tab:
https://www.youtube.com/c/pbsspacetime/community
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Theory of Everything Livestreams with Amazing Guests
PBS Member Stations rely on viewers like you. To support your local station, go to: http://to.pbs.org/DonateSPACE↓ More info below ↓Uploaded 23-07-20Join two epic livestreams about Theories of Everything! Sign up for prizes, a download link to the videos, and more at http://www.pbsspacetime.com/events.Check out our co-moderator Brian Keating's incredible channel at: https://www.youtube.com/DrBrian
Did Life on Earth Come from Space?
PBS Member Stations rely on viewers like you. To support your local station, go to: http://to.pbs.org/DonateSPACE↓ More info below ↓Uploaded 06-12-18Check out the new Space Time Merch Store!https://pbsspacetime.com/How did life on Earth get started? Did life on Earth originate on another planet? Either Mars, or in a distant solar system? Could Earth life have spread to have seeded life elsewhere?
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