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PODCAST

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. For all business inquiries and sponsorship opportunities please reach out to: pbsspacetime@lighthouseagents.com 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

science astronomy

All Episodes

19:59

Perpetual Motion From Negative Mass?

PBS Space Time ·

2026/09/06

PBS Member Stations rely on viewers like you. To support your local station, go to: http://to.pbs.org/DonateSPACE ↓ More info below ↓ Check out the new Space Time Merch Store! https://pbsspacetime.com/ Support Space Time on Patreon https://www.patreon.com/pbsspacetime Email your answers to: pbsspacetime@gmail.com With the subject heading: Negative Mass Challenge Question Challenge question: if 1kg of apples is $5 and 2kg is $10, how much is -1kg of apples? The answer? Priceless. Because you

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23:16

Sound Waves from the Beginning of Time

PBS Space Time ·

2026/09/05

PBS Member Stations rely on viewers like you. To support your local station, go to: http://to.pbs.org/DonateSPACE ↓ More info below ↓ You 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 Patreon https://www.patreon.com/pbsspacetime Email your answers to: pbsspacetime@gmail.com With the subject heading: Negative Mass Challenge Question Invisible to the naked eye, our night sky is

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22:55

Secrets of the Cosmic Microwave Background

PBS Space Time ·

2026/09/04

You can learn more about CuriosityStream at https://curiositystream.com/spacetime PBS Member Stations rely on viewers like you. To support your local station, go to: http://to.pbs.org/DonateSPACE Check out the new Space Time Merch Store! https://pbsspacetime.com/ Support Space Time on Patreon https://www.patreon.com/pbsspacetime Hook up an old antenna to your TV and scan between channels. The static buzz you hear is mostly due to the ambient radio produced by our noisy pre-galactic civilization

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23:15

The Impossibility of Perpetual Motion Machines

PBS Space Time ·

2026/09/03

You can learn more about CuriosityStream at https://curiositystream.com/spacetime PBS Member Stations rely on viewers like you. To support your local station, go to: http://to.pbs.org/DonateSPACE Check out the new Space Time Merch Store! https://pbsspacetime.com/ Support Space Time on Patreon https://www.patreon.com/pbsspacetime See Matt in NYC at Caveat March 7th at 9pm: https://www.caveat.nyc/event/astronaut-training-a-space-camp-game-show-for-lunatics-3-7-2019 Bad ideas come and go in

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22:07

Will You Travel to Space?

PBS Space Time ·

2026/09/03

PBS Member Stations rely on viewers like you. To support your local station, go to: http://to.pbs.org/DonateSPACE ↓ More info below ↓ Check out Sound Field: http://youtube.com/soundfieldpbs Check out the new Space Time Merch Store! https://pbsspacetime.com/ Support Space Time on Patreon https://www.patreon.com/pbsspacetime Thanks to Matthias Rüby for on-site camera work. https://www.instagram.com/matthiasrueby/ The private space-race has been on for a while now. The attention has been on

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25:06

Is Dark Energy Getting Stronger?

PBS Space Time ·

2026/09/02

Learn More about The Great Courses Plus: http://ow.ly/wvWC30o0QYV PBS Member Stations rely on viewers like you. To support your local station, go to: http://to.pbs.org/DonateSPACE Check out the new Space Time Merch Store! https://pbsspacetime.com/ Support Space Time on Patreon https://www.patreon.com/pbsspacetime The power of Dark Energy may be increasing as the universe ages. Subtle clues are emerging that the accepted model for the nature of dark energy and dark matter may not be all that. We

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21:33

Could the Universe End by Tearing Apart Every Atom?

PBS Space Time ·

2026/09/01

PBS Member Stations rely on viewers like you. To support your local station, go to: http://to.pbs.org/DonateSPACE ↓ More info below ↓ Of all the unlikely ends of the universe, the Big Rip has to be the most spectacular. Galaxies ripped to shreds, dogs and cat first living together, then tragically separated by the infinitely accelerating expansion of space on subatomic scales. Good thing it's not going to happen. Or is it? Check out the new Space Time Merch

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25:14

The Edge of an Infinite Universe

PBS Space Time ·

2026/08/31

PBS Member Stations rely on viewers like you. To support your local station, go to: http://to.pbs.org/DonateSPACE ↓ More info below ↓ Have you ever asked “what is beyond the edge of the universe?” And have you ever been told that an infinite universe that has no edge? You were told wrong. In a sense. We can define a boundary to an infinite universe, at least mathematically. And it turns out that boundary may be as real or even more real than the universe it contains. Sign Up on Patreon to get

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25:08

The Holographic Universe Explained

PBS Space Time ·

2026/08/31

PBS Member Stations rely on viewers like you. To support your local station, go to: http://to.pbs.org/DonateSPACE ↓ More info below ↓ We 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, even as physics shows us that this view of reality may be only a very narrow perception. One of the most startling possibilities

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20:22

No Dark Matter = Proof of Dark Matter?

PBS Space Time ·

2026/08/30

You can learn more about CuriosityStream at https://curiositystream.com/spacetime PBS Member Stations rely on viewers like you. To support your local station, go to: http://to.pbs.org/DonateSPACE We’ve been failing to detect dark matter for decades. Finally, the latest failure to detect dark matter may have actually proved its existence. One of these is true: either most of the matter in the universe is invisible and formed of something not explained by modern particle physics OR our understanding

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16:51

The Real Science of the EHT Black Hole

PBS Space Time ·

2026/08/29

You can learn more about CuriosityStream at https://curiositystream.com/spacetime PBS Member Stations rely on viewers like you. To support your local station, go to: http://to.pbs.org/DonateSPACE How do you take a picture of a black hole and what can we learn from it? Our first ever actual bona fide photo of a black hole, made by the Event Horizon Telescope and revealed to the world in a press conference on April 10th. Since then it’s got plenty of coverage, because … I mean look at it. It’s a

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23:59

Why Quantum Computing Requires Quantum Cryptography

PBS Space Time ·

2026/08/29

Learn more about Audible at: https://www.audible.com/spacetime or text spacetime to 500 500! PBS Member Stations rely on viewers like you. To support your local station, go to: http://to.pbs.org/DonateSPACE Quantum computing is cool, but you know what would be extra awesome - a quantum internet. In fact if we want the first we’ll need the latter. And the first step to the quantum internet is quantum cryptography. Check out the new Space Time Merch Store! https://pbsspacetime.com/ Support Space

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21:05

The Cosmic Dark Ages

PBS Space Time ·

2026/08/28

To Learn more about ExpressVPN, visit: https://www.expressvpn.com/spacetime PBS Member Stations rely on viewers like you. To support your local station, go to: http://to.pbs.org/DonateSPACE We live in the stelliferous era. Somewhere between 10 and 1000 billion trillion stars fill the observable universe with light. But there was a time before the first star ignited. A time we call the cosmic dark ages. Check out the new Space Time Merch Store! https://pbsspacetime.com/ Support Space Time on

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21:25

The Alchemy of Neutron Star Collisions

PBS Space Time ·

2026/08/27

PBS Member Stations rely on viewers like you. To support your local station, go to: http://to.pbs.org/DonateSPACE ↓ More info below ↓ Carl Sagan’s famous words: “We are star stuff” refers to a mind-blowing idea – that most atomic nuclei in our bodies were created in the nuclear furnace and the explosive deaths of stars that lived in the ancient universe. In recent years it’s become clear that the truth is even more mind-blowing. Many heavy elements - includes most precious metals - were produced

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20:17

How Black Holes Kill Galaxies

PBS Space Time ·

2026/08/26

To learn to think like a scientist check out http://Brilliant.org/SpaceTime PBS Member Stations rely on viewers like you. To support your local station, go to: http://to.pbs.org/DonateSPACE Check out the new Space Time Merch Store! https://pbsspacetime.com/ Support Space Time on Patreon https://www.patreon.com/pbsspacetime Black holes are really only dangerous if you get too close. Ha, who am I kidding. It turns out they may be responsible for ending star formation across the entire

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12:17

The Quasar from The Beginning of Time | STELLAR

PBS Space Time ·

2026/08/26

Thank you to Draper and its "We Hack the Moon" initiative for supporting PBS Digital Studios. Learn more at https://wehackthemoon.com. PBS Member Stations rely on viewers like you. To support your local station, go to: http://to.pbs.org/DonateSPACE Check out Physics Girl visit LIGO to see where they discovered Gravitational Waves https://youtu.be/jtp71NT0GNg Recently, the oldest quasar ever seen was discovered by the Gemini North telescope in Hawaii, the Magellan Telescopes at Las Campanas

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25:26

Thorium and the Future of Nuclear Energy

PBS Space Time ·

2026/08/25

PBS Member Stations rely on viewers like you. To support your local station, go to: http://to.pbs.org/DonateSPACE ↓ More info below ↓ Check out the new Space Time Merch Store! https://pbsspacetime.com/ Support Space Time on Patreon https://www.patreon.com/pbsspacetime Energy too cheap to meter - that was the promise of nuclear power in the 1950s, at least according to Lewis Strauss chairman of the Atomic Energy Commission. That promise has not come to pass - but with some incredible new

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21:04

The Quantum Internet

PBS Space Time ·

2026/08/24

PBS Member Stations rely on viewers like you. To support your local station, go to: http://to.pbs.org/DonateSPACE ↓ More info below ↓ Check out the new Space Time Merch Store! https://pbsspacetime.com/ Support Space Time on Patreon https://www.patreon.com/pbsspacetime When we finally have a quantum internet you’ll be able to simultaneously like and dislike this video. But we don’t. So I hope you like it. The world is widely regarded as being well and truly into the digital age, also called the

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19:18

Did Time Start at the Big Bang?

PBS Space Time ·

2026/08/23

Thanks to LastPass for sponsoring PBS DS. You can check out LastPass by going to https://lastpass.onelink.me/HzaM/2019Q3JulyPBSspace PBS Member Stations rely on viewers like you. To support your local station, go to: http://to.pbs.org/DonateSPACE Our universe started with the big bang. But only for the right definition of “our universe”. And of “started” for that matter. In fact, probably the Big Bang is nothing like what you were taught. A hundred years ago we discovered the beginning of the

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13:56

Deciphering The Vast Scale of the Universe | STELLAR

PBS Space Time ·

2026/08/23

Thank you to Draper and its Hack the Moon initiative for supporting PBS Digital Studios | Learn more at https://wehackthemoon.com. PBS Member Stations rely on viewers like you. To support your local station, go to: http://to.pbs.org/DonateSPACE One of the fundamental questions humanity has always asked is how big is our Universe? For much of human history, people believed that Planet Earth was the very center of the entire universe. And Earth is pretty big. But compared the rest of the universe,

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