PBS Space Time (2015)
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.
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Episodes
SpecialsSeason 1Season 2015Season 2016Season 2017Season 2018Season 2019Season 2020Season 2021Season 2022Season 2023Season 2024Season 2025Season 2026
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1. Can Cosmic Voids Solve The Crisis in Cosmology?2024-01-10 · 15mTwo 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
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2. Does Antimatter Create Anti-Gravity?2024-01-17 · 18mFrom hoverboards to flying cars to cloud cities, anti-gravity is a staple of science fiction and our dream of a less Earth-bound future. But in the real universe gravity appears to
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3. Did JWST Solve The Mystery of Supermassive Black Hole Origins?2024-02-14 · 16mThis 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 litera
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4. What if Singularities DO NOT Exist?2024-02-22 · 16mIt's not too often that a giant of physics threatens to overturn an idea held to be self-evident by generations of physicists. Well, that may be the fate of the famous Penrose Sing
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5. EMP Attack: The Real Science of Electromagnetic Pulse2024-02-29 · 15mEMPs aren’t science fiction. Real militaries are experimenting on real EMP generators, and as Starfish Prime showed us, space nukes can send powerful EMPs to the surface. So what e
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6. Dark Forest: Should We NOT Contact Aliens?2024-03-14 · 16mIn 1974 we sent the Arecibo radio message towards Messier 13, a globular cluster near the edge of the Milky Way, made up of a few hundred thousand stars. The message was mostly sym
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7. Does Space Emerge From A Holographic Boundary?2024-03-21 · 16mSpace seems fundamental. To build a universe, surely you need something to build it on or in. Many, maybe most physicists now think that the fabric of space emerges from something
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8. What If Gravity is NOT A Fundamental Force? | Entropic Gravity2024-03-28 · 15mThere are four fundamental forces - the strong and weak nuclear forces, electromagnetism, and gravity. Except maybe gravity is no more fundamental than the force of a stretched ela
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9. How Eclipses Revealed Our Solar System2024-04-06 · 16mOf all the astronomical phenomena you can witness, the total solar eclipse has to be the most visceral--the most in-your-face reminder that our reality consists of giant balls of r
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10. Why Is The World Rushing Back To The Moon?2024-04-18 · 17mThe 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
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11. What Happens If You Jump Into A Black Hole?2024-05-01 · 17mMeet 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 contra
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12. Interstellar Expansion WITHOUT Faster Than Light Travel2024-05-16 · 21mIn the far future we may have advanced propulsion technologies like matter-antimatter engines and compact fusion drives that allow humans to travel to other stars on timescales sho
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13. Can Black Holes Unify General Relativity & Quantum Mechanics?2024-05-24 · 15mBlack holes are inevitable predictions of general relativity—our best theory of space, time and gravity. But they clash in multiple ways with quantum mechanics, our equally success
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14. How Supernovas Act as Universe’s Largest Particle Accelerators2024-05-30 · 14mCern's Large Hadron Collider routinely collides particles at energies equivalent to a fraction of a second after the Big Bang. If this worries you, then the following fact will eit
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15. Is It IMPOSSIBLE To Cross The Event Horizon? | Black Hole Firewall Paradox2024-06-13 · 19mSo you’ve decided to jump into a black hole. Good news: as long as the black hole is big enough you can sail through the event horizon without harm and get to experience the interi
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16. Will The Sun’s Magnetic Field Flip This Year?2024-06-20 · 18mSolar 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?
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17. Can a Particle Be Neither Matter Nor Force?2024-06-27 · 22mAll particles belong to two large groups: fermions like protons and electrons make everything we consider "matter", while bosons like photons and gluons transmit the fundamental fo
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18. How To Detect Faster Than Light Travel2024-07-18 · 18mWarp drives may or may not be possible, but if they are then could a distant alien civilization’s warp fields produce gravitational waves that we could see here on Earth? According
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19. Was Penrose Right? NEW EVIDENCE For Quantum Effects In The Brain2024-07-25 · 19mNobel laureate Roger Penrose is widely held to be one of the most brilliant living physicists for his wide-ranging work from black holes to cosmology. And then there’s his idea abo
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20. Colored Black Holes Explained2024-08-01 · 17mThe primary characteristic that defines black holes is in the name. Black holes are black. The gravitational pull at the event horizon is so powerful that not even light can escape
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21. Can We Create New Elements Beyond the Periodic Table?2024-08-15 · 18mScientists have been slowly extending the periodic table one element at a time, pushing to higher and higher masses, and have discovered some incredibly useful materials along the
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22. Is Gravity RANDOM Not Quantum?2024-08-22 · 20mThe 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 wei
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23. What If Gravity Isn’t Quantum? New Experiments Explore2024-09-12 · 18mIf we discover how to connect quantum mechanics with general relativity we’ll pretty much win physics. There are multiple theories that claim to do this, but it’s notoriously diffi
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24. The NEW PHYSICS of Black Hole Star Capture | Extreme Tidal Disruption Events2024-09-19 · 18mIf you track the motion of individual stars in the ultra-dense star cluster at the very center of the Milky Way you’ll see that they swing in sharp orbits around some vast but invi
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25. What If The Universe DID NOT Start With The Big Bang?2024-09-26 · 18mHere’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 com
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26. What If The Cosmological Constant Is NOT Constant?2024-10-10 · 18mWe know that the universe is getting bigger. And we know that the speed that the universe is getting bigger is also getting bigger. The standard assumption is that the acceleration
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27. Do Neutron Stars Shine In Dark Matter?2024-10-17 · 16mNeutron stars aren't dark matter--we figured that out a while ago. But new research is telling us that they may be dark matter factories. They may produce the exotic axion, one of
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28. How Can Humanity Become a Kardashev Type 1 Civilization?2024-11-07 · 22mImagine a world where humanity masters every planetary resource available to it—our first step on the famous Kardeshev scale of technological advancement. How distant is that step?
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29. Can Space Time Remember?2024-11-14 · 15mThere are cosmic events so powerful that they leave permanent marks on the fabric of the universe itself. Imagine two colossal black holes spiraling into each other, yes they send
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30. Does the Planck Length Break E=MC^2?2024-11-21 · 19mEvery good nerd knows that E=mc^2. Every great nerd knows that, really, E^2=m^2c^4+p^2c^2 Want to know what that even means? Sure, I’ll tell you, but today I’d like to invite you t
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31. The NEW Ultimate Energy Limit of the Universe2024-12-05 · 18mIs there a limit to how much energy you can cram into, or pull out of one patch of space? Well, we thought so, but the James Webb Space Telescope has found a quasar that simultaneo
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32. What Does An Electron ACTUALLY Look Like?2024-12-12 · 16mWhat does an electron really look like? I mean, if we zoom in all the way. Is it a sizeless speck of charge? Is it a multidimensional vortex of quantum strangeness? Is it the bound
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33. Does Infinity - Infinity = an Electron?2024-12-19 · 17mWhat do you get if you take something that’s infinitely massive and combining with something else that’s negative infinitely massive? You get a single electron, at least that’s wha
Cast
Matthew O’DowdSelf - HostImages
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