Why This Universe?

In 2023, Dan made a bet with physicist Yoni Kahn about whether AI would be able to pass a graduate-level quantum field theory course by 2026. Today on the show, they revisit their bet and discuss what AI is capable of in physics today, and how it might change the field moving forward.

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Modern physics tells us a lot about light; that it's both a wave and a particle, and that it sets the speed limit of the universe, for example. But how did we come to understand light in this way?

In Dan's first solo episode, he takes us through theories of light through the ages, starting from the earliest accounts of ancient ideas and bringing us all the way to modern times.

Let us know what you think about this new format!

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It's been a while! To make up for lost time, today's episode is a rundown of all the physics news you should know. Hear what is keeping physicists at the edge of their seat, and what physics news you should keep your eyes out for in the coming years.

Also, this episode comes with an update from us at WTU: This will be Shalma's last episode as co-host and editor (though she'll continue to help out with production behind the scenes).

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An unlikely change in the theory of quantum mechanics would lead to bizarre new conclusions. Our guest talks us through non-linear quantum mechanics, and how physicists like him are testing it.

For ad-free episodes and exclusive ask-us-anything segments, join us for just $3 a month on Patreon: https://patreon.com/whythisuniverse

Our merch is available here: https://www.shalmawegsman.com/why-this-universe

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Quantum mechanics is full of surprises. But somehow, the theory is captured almost entirely in a single equation. Today we explore the Schrödinger equation: how it works, what it says about nature, and why it revolutionized physics.

For ad-free episodes and exclusive ask-us-anything segments, join us for just $3 a month on Patreon: https://patreon.com/whythisuniverse

Our merch is available here: https://www.shalmawegsman.com/why-this-universe

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In the years leading up to the Large Hadron Collider turning on, the physics community was buzzing with curiosity and excitement about what they were about to discover. These moments were captured in the documentary Particle Fever, created by the particle physicist David Kaplan. On today's episode, he recounts these historic years from the perspective of both physicist and filmmaker.

For ad-free episodes and exclusive ask-us-anything segments, join us for just $3 a month on Patreon: https://patreon.com/whythisuniverse

Our merch is available here: https://www.shalmawegsman.com/why-this-universe

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If we met aliens, could we communicate through physics? Daniel Whiteson explores this question on today's episode. For more, check out his new book, Do Aliens Speak Physics?

For ad-free episodes and exclusive ask-us-anything segments, join us for just $3 a month on Patreon: https://patreon.com/whythisuniverse

Our merch is available here: https://www.shalmawegsman.com/why-this-universe

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In honor of Nobel prize season, we remember some people whose important work in the past has been overlooked by the Nobel committee.

For ad-free episodes and exclusive ask-us-anything segments, join us for just $3 a month on Patreon: https://patreon.com/whythisuniverse

Our merch is available here: https://www.shalmawegsman.com/why-this-universe

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Our universe is expanding. But when physicists measure how fast this expansion rate is, they get two different answers. Hear what this crisis means from Nobel Prize winner Adam Riess.

For ask-us-anything segments and other exclusives, join us for just $3 a month on Patreon: https://patreon.com/whythisuniverse

Our merch is available here: https://www.shalmawegsman.com/why-this-universe

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Adam Riess recounts the moments of his Nobel prize-winning discovery that our universe is expanding at an accelerating rate, powered by a mysterious energy source called dark energy.

For ask-us-anything segments and other exclusives, join us for just $3 a month on Patreon: https://patreon.com/whythisuniverse

Our merch is available here: https://www.shalmawegsman.com/why-this-universe

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We answer your questions. To listen to our backlog of ask-us-anything episodes for free, head to our Patreon, or join for $3/month to submit your questions: https://www.patreon.com/whythisuniverse

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To listen to our backlog of past ask-us-anything episodes for free, head to our Patreon, or join for $3/month to ask us questions: https://www.patreon.com/whythisuniverse

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Learn what exciting cosmology results and potential discoveries await us in 2025!For exclusive ask-us-anything episodes, join us for just $3 a month on Patreon: https://patreon.com/whythisuniverse. Our merch is available here: https://www.shalmawegsman.com/why-this-universe

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A discovery last year reveals our galaxy in a whole new light - except it's not light, it's neutrinos! Learn what this discovery can teach us about the Milky Way and beyond.For exclusive ask-us-anything episodes, join us for just $3 a month on Patreon: https://patreon.com/whythisuniverse. Our merch is available here: https://www.shalmawegsman.com/why-this-universe

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Is it possible that dark energy is not a constant, but rather is changing over time? Sean Carroll talks to us about how our understanding of dark energy evolved in recent history, and what is still left unknown.For exclusive ask-us-anything episodes, join us for just $3 a month on Patreon: https://patreon.com/whythisuniverse. Our merch is available here: https://www.shalmawegsman.com/why-this-universe

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Dan and Shalma have a candid conversation about the state of dark matter research, and the ways the field has changed over the last few years.For exclusive ask-us-anything episodes, join us for just $3 a month on Patreon: https://patreon.com/whythisuniverse. Our merch is available here: https://www.shalmawegsman.com/why-this-universe

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Why does something exist, rather than nothing? Special guest Sean Carroll helps us explore this deep philosophical question.For ad free episodes and other exclusives, join us for just $3 a month on Patreon: https://patreon.com/whythisuniverse.Our merch is available here: https://www.shalmawegsman.com/why-this-universe

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There has been some criticism of the process scientists use to check each other's work. Today we take a deep dive into peer review to determine how broken it really is.For ad free episodes and other exclusives, join us for just $3 a month on Patreon: https://patreon.com/whythisuniverse.Our merch is available here: https://www.shalmawegsman.com/why-this-universe

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Learn how Noether's profound mathematical theorem relating symmetries to conservation laws is deeply woven into the physics of the universe. Enjoy this rerun of an earlier episode as we take our summer break.For ad free episodes and other exclusives, join us for just $3 a month on Patreon: https://patreon.com/whythisuniverseOur merch is available here: https://www.shalmawegsman.com/why-this-universe

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We explore the diverse world of stars in the universe, from those similar to our Sun to those totally unrecognizable.For ad free episodes and other exclusives, join us for just $3 a month on Patreon: https://patreon.com/whythisuniverseOur merch is available here: https://www.shalmawegsman.com/why-this-universe

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