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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

21:14

Quantum Theory's Most Incredible Prediction | Space Time

PBS Space Time ·

2026/09/20

Viewers like you help make PBS (Thank you 😃) . Support your local PBS Member Station here: https://to.pbs.org/DonateSPACE Let’s talk about the best evidence we have that the theories of quantum physics truly represent the underlying workings of reality. You can signup for your trial to The Great Courses Plus at: http://ow.ly/bugR30hIvbu Quantum field theory is notoriously complicated, built from mind-bendingly abstract mathematics. But are the underlying rules of reality really so far from human

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23:37

How Will the Universe End? | Space Time

PBS Space Time ·

2026/09/19

Viewers like you help make PBS (Thank you 😃) . Support your local PBS Member Station here: https://to.pbs.org/DonateSPACE Thanks to Wix for supporting PBS Digital Studios. You can go to https://bit.ly/2o1DSHZ to get started on Wix Code! In 100 trillion years the era of stars will be over. We live in an unusual age – the age when the stars still shine. We should count ourselves lucky – nearly all of future history will be dark. But events will still unfold in that long, cooling darkness, and

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18:26

Is There Life on Mars?

PBS Space Time ·

2026/09/19

Viewers like you help make PBS (Thank you 😃) . Support your local PBS Member Station here: https://to.pbs.org/DonateSPACE There is no greater hero in our search for life on mars than a little robot named Opportunity. You can further support us on Patreon at https://www.patreon.com/pbsspacetime Get your own Space Time t-shirt at http://bit.ly/1QlzoBi Tweet at us! @pbsspacetime Facebook: facebook.com/pbsspacetime Email us! pbsspacetime [at] gmail [dot] com Comment on Reddit:

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16:09

The Black Hole Entropy Enigma

PBS Space Time ·

2026/09/18

Viewers like you help make PBS (Thank you 😃) . Support your local PBS Member Station here: https://to.pbs.org/DonateSPACE Thanks to CuriosityStream for supporting PBS Digital Studios. You can learn more at https://www.curiositystream.com/spacetime and use the code "spacetime" during the sign-up process. You can further support us on Patreon at https://www.patreon.com/pbsspacetime Get your own Space Time t-shirt at http://bit.ly/1QlzoBi Tweet at us! @pbsspacetime Facebook:

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20:56

How Much Information is in the Universe?

PBS Space Time ·

2026/09/17

Viewers like you help make PBS (Thank you 😃) . Support your local PBS Member Station here: https://to.pbs.org/DonateSPACE There’s quite a bit of stuff in the universe, to put it mildly. You can further support us on Patreon at https://www.patreon.com/pbsspacetime Get your own Space Time t-shirt at http://bit.ly/1QlzoBi Tweet at us! @pbsspacetime Facebook: facebook.com/pbsspacetime Email us! pbsspacetime [at] gmail [dot] com Comment on Reddit: http://www.reddit.com/r/pbsspacetime Help

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21:25

Quantum Gravity and the Hardest Problem in Physics |...

PBS Space Time ·

2026/09/16

Viewers like you help make PBS (Thank you 😃) . Support your local PBS Member Station here: https://to.pbs.org/DonateSPACE Between 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/pbsspacetime Get your own Space Time t-shirt at http://bit.ly/1QlzoBi Tweet at us! @pbsspacetime Facebook: facebook.com/pbsspacetime Email us! pbsspacetime [at] gmail [dot] com Comment on Reddit:

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20:32

How to Detect Extra Dimensions

PBS Space Time ·

2026/09/16

Viewers like you help make PBS (Thank you 😃) . Support your local PBS Member Station here: https://to.pbs.org/DonateSPACE On this Space Time Journal Club we look at how gravitational waves can be used to search for extra dimensions of space! To learn more about CuriosityStream you can go to: https://www.curiositystream.com/space... and use the code "spacetime" during the sign-up process. "Limits on the number of spacetime dimensions from GW170817" Pardo, Fishbach, Holz & Spergel 2018

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19:53

Computing a Universe Simulation

PBS Space Time ·

2026/09/15

Viewers like you help make PBS (Thank you 😃) . Support your local PBS Member Station here: https://to.pbs.org/DonateSPACE Physics seems to be telling us that it’s possible to simulate the entire universe on a computer smaller than the universe. You can further support us on Patreon at https://www.patreon.com/pbsspacetime Space Time Challenge Winners Jin Du Loren Booker Kevin Selva Prasanna May Awbin John Reza Ian Grams Challenge Winners: Please PBSspacetime@gmail.com with your name, address,

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21:22

What are the Strings in String Theory?

PBS Space Time ·

2026/09/14

Viewers like you help make PBS (Thank you 😃) . Support your local PBS Member Station here: https://to.pbs.org/DonateSPACE To learn more about 23andMe head to https://23andme.com/spacetime Why strings? What are they made of? How did physicists even come up with this bizarre idea? And what’s all this nonsense of extra dimensions? You can further support us on Patreon at https://www.patreon.com/pbsspacetime Get your own Space Time t-shirt at http://bit.ly/1QlzoBi Tweet at us

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23:21

Will We Ever Find Alien Life?

PBS Space Time ·

2026/09/14

Viewers like you help make PBS (Thank you 😃) . Support your local PBS Member Station here: https://to.pbs.org/DonateSPACE You can learn more about CuriosityStream at https://curiositystream.com/spacetime The silence of the galaxy and the resulting Fermi Paradox has perplexed us for nearly 50 years. But our most recent surveys of the Milky Way finally allow us to draw scientific conclusions about the depressingly persistent absence of aliens. You can further support us on Patreon at

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22:58

Are Virtual Particles A New Layer of Reality?

PBS Space Time ·

2026/09/13

Viewers like you help make PBS (Thank you 😃) . Support your local PBS Member Station here: https://to.pbs.org/DonateSPACE Let me tell you a story about virtual particles. It may or may not be true. You can further support us on Patreon at https://www.patreon.com/pbsspacetime Get your own Space Time t-shirt at http://bit.ly/1QlzoBi Tweet at us! @pbsspacetime Facebook: facebook.com/pbsspacetime Email us! pbsspacetime [at] gmail [dot] com Comment on Reddit:

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21:32

Why String Theory is Right

PBS Space Time ·

2026/09/12

You can learn more about The Great Courses Plus here: http://ow.ly/3qDN30hIvdb Viewers like you help make PBS (Thank you 😃) . Support your local PBS Member Station here: https://to.pbs.org/DonateSPACE Some 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 further support us on Patreon at https://www.patreon.com/pbsspacetime Get your own Space Time t-shirt at

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21:10

Supersymmetric Particle Found?

PBS Space Time ·

2026/09/11

PBS Member Stations rely on viewers like you. To support your local station, go to: http://to.pbs.org/DonateSPACE ↓ More info below ↓ With the large hadron collider running out of places to look for clues to a deeper theory of physics, we need a bigger particle accelerator. We have one - the galaxy. Watch Two Cents here! https://www.youtube.com/channel/UCL8w_A8p8P1HWI3k6PR5Z6w You can further support us on Patreon at https://www.patreon.com/pbsspacetime Get your own Space Time t-shirt at

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23:16

'Oumuamua Is Not Aliens

PBS Space Time ·

2026/09/11

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 To repeat the space time maxim: it’s never aliens … until it is. So let’s talk about ‘oumuamua. You can further support us on Patreon at https://www.patreon.com/pbsspacetime Get your own Space Time t-shirt at http://bit.ly/1QlzoBi Tweet at us! @pbsspacetime Facebook: facebook.com/pbsspacetime Email us

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24:18

Did Life on Earth Come from Space?

PBS Space Time ·

2026/09/10

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/ 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? Let’s see what modern science has to say about the plausibility of panspermia. You can further support us on

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22:55

Quantum Physics in a Mirror Universe

PBS Space Time ·

2026/09/09

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/ When you look in mirror, and see what you think is a perfect reflection. You might be looking at universe whose laws are fundamentally different. You can further support us on Patreon at https://www.patreon.com/pbsspacetime Tweet at us

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24:23

Why String Theory is Wrong

PBS Space Time ·

2026/09/08

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 There’s this idea that beauty is a powerful guide to truth in the mathematics of physical theory. String theory is certainly beautiful in the eyes of many physicists

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18:38

Are Dark Matter And Dark Energy The Same?

PBS Space Time ·

2026/09/08

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 Astronomers are the worst at naming things. Dark energy AND dark matter? Who can remember which is which. But perhaps one astronomer has just fixed it, with a theory that says perhaps actually they are they same stuff. Space Time

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24:11

Our Antimatter, Mirrored, Time-Reversed Universe

PBS Space Time ·

2026/09/07

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 The foundations of quantum theory rests on its symmetries. For example, it should be impossible to distinguish our universe from one that is that is the perfect mirror opposite in charge, handedness, and the direction of time. But

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23:49

The Crisis in Cosmology

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 The search for a single number: the hubble constant, which is the rate of expansion of our universe, has consumed astronomers for generations. Finally, two powerful and independent methods have refined its measurement to

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