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The second in our two event series about Theories of Everything! Watch the first one: https://www.youtube.com/watch?v=_izocEgArtQ

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Existing Theories of Everything have not yet produced experimental evidence that solves the fundamental challenges facing physics. That lack of progress has opened up a sea of controversy, from disagreements about the very necessity of TOEs, to questioning the cost/benefit of mega-billion dollar particle accelerators in search of them, to the emergence of competing TOEs from physicists outside of the academic community. In this 90 minute chat we dive into the existential questions around TOEs.

Special thanks to Brian Keating, Lee Smolin, Sabine Hossenfelder, and Eric Weinstein for helping us create this great event.

Our Guests’ Work:

Sabine Hossenfelder
YouTube Channel: https://www.youtube.com/SabineHossenfelder
Lost in Math: How Beauty Led Physics Astray: https://www.basicbooks.com/titles/sabine-hossenfelder/lost-in-math/9781541646766/

Eric Weinstein
The Portal Podcast: https://ericweinstein.org/
The Portal Wiki: https://projects.theportal.wiki/

Lee Smolin
Einstein’s Unfinished Revolution: The Search for What Lies Beyond the Quantum
https://www.amazon.com/Einsteins-Unfinished-Revolution-Search-Quantum/dp/1594206198/ref=sr_1_1?dchild=1&keywords=lee+smolin&qid=1597087375&s=books&sr=1-1
Time Reborn: From the Crisis in Physics to the Future of the Universe
https://www.amazon.com/Time-Reborn-Lee-Smolin/dp/0544245598/ref=sr_1_2?dchild=1&keywords=lee+smolin&qid=1597087375&s=books&sr=1-2
Three Roads to Quantum Gravity
https://www.amazon.com/gp/product/0465094546/ref=dbs_a_def_rwt_hsch_vapi_tpbk_p1_i3
The Trouble With Physics: The Rise of String Theory, The Fall of a Science, and What Comes Next
https://www.amazon.com/gp/product/061891868X/ref=dbs_a_def_rwt_hsch_vapi_tpbk_p1_i2
The Life of the Cosmos
https://www.amazon.com/gp/product/0195126645/ref=dbs_a_def_rwt_hsch_vapi_tpbk_p1_i4

Join 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.

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July 28 @ 4pm Eastern (8pm UTC) – What is a Theory of Everything?
Moderated by Matt O’Dowd & Brian Keating
​Featuring Max Tegmark, Stephon Alexander, James Beacham

In this 90 minute conversation we explore what Theories of Everything really are outside the hype, dig into the essential physics mysteries that compel us to search for one, and survey the major TOE contenders currently being explored by the physics community.

August 4 @ 10:30am Eastern (2:30pm UTC) – Theory of Everything Controversies
Moderated by Matt O’Dowd & Brian Keating
​Featuring Lee Smolin, Eric Weinstein, Sabine Hossenfelder

Existing Theories of Everything have not yet produced experimental evidence that solves the fundamental challenges facing physics. That lack of progress has opened up a sea of controversy, from disagreements about the very necessity of TOEs, to questioning the cost/benefit of mega-billion dollar particle accelerators in search of them, to the emergence of competing TOEs from physicists outside of the academic community. In this 90 minute chat we dive into the existential questions around TOEs.

PBS Member Stations rely on viewers like you. To support your local station, go to: http://to.pbs.org/DonateSPACE
↓ More info below ↓

Join 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/DrBrianKeating

July 28 @ 4pm Eastern (8pm UTC) – What is a Theory of Everything?
Moderated by Matt O’Dowd & Brian Keating
​Featuring Max Tegmark, Stephon Alexander, James Beacham, Lisa Randall

In this 90 minute conversation we explore what Theories of Everything really are outside the hype, dig into the essential physics mysteries that compel us to search for one, and survey the major TOE contenders currently being explored by the physics community.

August 4 @ 10:30am Eastern (2:30pm UTC) – Theory of Everything Controversies
Moderated by Matt O’Dowd & Brian Keating
​Featuring Lee Smolin, Eric Weinstein, Sabine Hossenfelder

Existing Theories of Everything have not yet produced experimental evidence that solves the fundamental challenges facing physics. That lack of progress has opened up a sea of controversy, from disagreements about the very necessity of TOEs, to questioning the cost/benefit of mega-billion dollar particle accelerators in search of them, to the emergence of competing TOEs from physicists outside of the academic community. In this 90 minute chat we dive into the existential questions around TOEs.

PBS Member Stations rely on viewers like you. To support your local station, go to: http://to.pbs.org/DonateSPACE
↓ More info below ↓

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When we detected the very first gravitational wave, a new window was opened to the mysteries of the universe. We knew we’d see things previously thought impossible. And we just did – an object on the boundary between neutron stars and black holes, which promises to reveal the secrets of both.

Hosted by Matt O’Dowd
Written by Matt O’Dowd
Graphics by Leonardo Scholzer, Yago Ballarini, & Pedro Osinski
Directed by: Andrew Kornhaber
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Previous Episodes Referenced:
Ligo’s First Detection of Gravitational Waves: https://www.youtube.com/watch?v=gw-i_VKd6Wo
The Future of Gravitational Waves: https://www.youtube.com/watch?v=eJ2RNBAFLj0
How to build a black hole https://www.youtube.com/watch?v=xx4562gesw0&vl=en
Strange Stars – https://www.youtube.com/watch?v=u4RNGRyzt10

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The most precious substance in our universe is not gold, nor oil. It’s not even printer ink. It’s antimatter. But it’s worth every penny of it’s very high cost, because it may hold the answer to the question of why anything exists in our universe at all.

Hosted by Matt O’Dowd
Written by Katie McCormick & Matt O’Dowd
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Black hole singularities break physics – fortunately, the universe seems to conspire to protect itself from their causality-destroying madness. At least, so says the cosmic censorship hypothesis. Only problem is many physicists think it might be wrong, and that naked singularities may exist after all.

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Black holes are about the worst subjects for direct study in the universe. But at this stage, it’s all we can do to convince ourselves of their existence. Actually studying the physics of real black holes is much, much harder. I mean, we could try to make one – but that’s way beyond our current tech level, and also potentially humanity-destroying. Well it turns out we don’t need to make real black holes to at least get started with the lab work. We can instead study analog black holes – and by analog, I don’t mean old fashioned clockwork black holes – I mean analogies. Physical systems that aren’t black holes but that behave in similar ways – and may reveal the real behaviours of real black holes.

End Credits Music by J.R.S. Schattenberg: https://www.youtube.com/channel/UCRl6-nb4iOnsij-vnpAjp0Q

Matt Visser Paper
https://arxiv.org/abs/gr-qc/9712010

Hosted by Matt O’Dowd
Written by Daniel Garisto & Matt O’Dowd
Graphics by Leonardo Scholzer, Yago Ballarini, & Pedro Osinski
Directed by: Andrew Kornhaber
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#space #astrophysics #blackholes

Previous Episodes Referenced:

Unruh Radiation https://www.youtube.com/watch?v=7cj6oiFDEXc
Hawking Radiation: https://www.youtube.com/watch?v=qPKj0YnKANw&vl=en
How Black Hole Spin Space Time https://www.youtube.com/watch?v=UjgGdGzDFiM&t=2s
What’s On the Other Side of a Black Hole: https://www.youtube.com/watch?v=T4oYvSH6jJ8

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Conformal Cyclic Cosmology is a story of the origin and the end of our universe from great mathematical physicist Sir Roger Penrose. It’s goes like this: the infinitely far future, when the universe has expanded exponentially to to an unthinkably large size, and every black hole and particle has decayed into faint radiation …. that infinite stretch of space and time is identically the SAME THING as the infinitesimal and instantaneous big bang of a new universe, and our universe is just one in an endless chain.

Hosted by Matt O’Dowd
Written by Matt O’Dowd
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End Credits Music by J.R.S. Schattenberg: https://www.youtube.com/channel/UCRl6-nb4iOnsij-vnpAjp0Q

#space #astrophysics #universe

Previous Episodes Discussed
Geometry of Causality – https://www.youtube.com/watch?v=1YFrISfN7jo
Higgs Mechanism – https://www.youtube.com/watch?v=kixAljyfdqU

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With the global pandemic of Covid 19 still encompassing the world, we are generally not big fans of viruses right now. But we sure are thinking about them a lot. That’s right, even astrophysicists are pondering these bizarre little critters. In fact, astrovirology, although very new, is actually an emerging subfield of astrobiology. And that’s because it turns out viruses don’t just influence organisms – they’re incredibly important on a planetary scale. Perhaps an interplanetary scale.

Virology Links:
Dr. Vincent Racaniello’s Columbia University virology course:
https://www.youtube.com/playlist?list=PLGhmZX2NKiNldpyRUBBEzNoWL0Cso1jip

PBS Eons Where do Viruses Come From?
https://youtu.be/X31g5TB-MRo

Hosted by Matt O’Dowd
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#space #astrophysics #astrovirology

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It’s been 120 years since Henry Cavendish measured the gravitational constant with a pair of lead balls suspended by a wire. The fundamental nature of gravity still eludes our best minds – but those secrets may be revealed by turning back to the Cavendish experiment. That steampunk contraption may even reveal the existence of extra dimensions of space.

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#space #astrophysics #gravity

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