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Ever wish you could travel backward in time and do things differently? Good news: the laws of physics seem to say traveling backward in time is the same as traveling forwards. So why do we seem to be stuck in this inexorable flow towards the future? It’s time to begin our journey towards really understanding time.

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Physicists have a long history of sticking our noses where they don’t belong – and one of our favorite places to step beyond our expertise is the question of consciousness and free will. Sometimes our musings are insightful, sometimes incoherent, and usually at least somewhat naive. Which a fair description of this show, so of course Space Time needs to weigh in physics and free will..

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Our universe seems pretty complicated. We have a weird zoo of elementary particles, which interact through very different fundamental forces. But some extremely subtle clues in nature have led us to believe that the forces of nature were once unified, ruled by a single, grand symmetry. But how does one force separate into multiple? And how do the forces of nature arise from mathematical symmetries in the first place?

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The Nobel prize in physics this year went to black holes. Generally speaking. Specifically, it was shared by the astronomers who revealed to us the Milky Way’s central black hole and by Roger Penrose, who proved that in general relativity, every black hole contains a place of infinite gravity – a singularity. But the true impact of Penrose’s singularity theorem would is much deeper – it leads us to the limits Einstein’s great theory and to the origin of the universe.

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Einstein’s special theory of relativity combines space and time into one dynamic, unified entity – spacetime. But if time is connected to space, could the universe be anything but deterministic? And does that mean that the future is predestined?

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Is all that exists just whatever exists right now? Is the past erased and the future a void yet to be filled? Well, the answer lies in between the past and the future – in the elusive, ever-moving eye-blink that we call the present.

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If you rank the most habitable places in our solar system Venus lands pretty low, with surface temperatures hot enough to melt lead and sulphuric acid rain. And yet it may have just jumped to the front of the pack. In fact, we may have detected the signature of alien life – Venusian life -for the first time.

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Your extensive posting history on r/birdswitharms and your old fanfiction-heavy livejournal are both one tiny math problem away from becoming public knowledge. That math problem is prime number factoring, and the new era of quantum computers may lay bare your indiscretions, as well as collapse the entire digital economy. Unless we get us some post-quantum cryptography post-haste. So, how close are we?

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One of the most bizarre proposals for life not as we know it doesn’t even use atoms. It proposes that fundamental kinks and defects in the fabric of the universe – cosmic strings beaded with magnetic monopoles – may evolve into complex structures, and even life, within stars. This idea was just published in Letters High Energy Physics Letters by physicists Luis Anchordoqui and Eugene Chudnovsky, and today on Space Time Journal Club we’re going to see how legit this actually is.

Can Self-Replicating Species Flourish in the Interior of a Star? Paper Link
http://journals.andromedapublisher.com/index.php/LHEP/article/view/166

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Hosted by Matt O’Dowd
Written by Matt O’Dowd
Graphics by Leonardo Scholzer, Yago Ballarini, & Pedro Osinski
Directed by: Andrew Kornhaber
Camera Operator: Setare Gholipour
Executive Producers: Eric Brown & Andrew Kornhaber

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

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The great physicist Hermann Weyl once said: “My work always tried to unite the true with the beautiful, but when I had to choose one or the other, I usually chose the beautiful.” But is this actually good advice for doing physics?

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Sign up for the mailing list to get episode notifications and hear special announcements!
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Hosted by Matt O’Dowd
Written by Matt O’Dowd
Graphics by Leonardo Scholzer, Yago Ballarini, & Pedro Osinski
Directed by: Andrew Kornhaber
Camera Operator: Setare Gholipour
Executive Producers: Eric Brown & Andrew Kornhaber

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

Special Thanks to All our Supporters on Patreon!

Big Bang Supporters
Scott Gray
James Younger
Robert Doxtator
Ahmad Jodeh
Caed Aldwych
Radu Negulescu
Alexander Tamas
Morgan Hough
Juan Benet
Fabrice Eap
Mark Rosenthal
David Nicklas

Quasar Supporters
Alec S-L
Christina Oegren
Mark Heising
Vinnie Falco
william bryan

Hypernova Supporters
Mark Matthew Bosko
Justin Jermyn
Jason Finn
Anton Kochkov
Julian Tyacke
Syed Ansar
John R. Slavik
Mathew
Danton Spivey
Donal Botkin
John Pollock
Edmund Fokschaner
Joseph Salomone
Matthew O’Connor
chuck zegar
Jordan Young
Hank S
John Hofmann
Timothy McCulloch

Gamma Ray Burst Supporters
Richard Deighton
Lucas Morgan
Eric Webster
David Johnston
J. King
Michael Barton
Christopher Barron
James Ramsey
Mr T
Andrew Mann
Jeremiah Johnson
fieldsa eleanory
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Peter Mertz
Kevin O’Connell
Bryan Dawley
Isaac Suttell
Devon Rosenthal
Oliver Flanagan
Bleys Goodson
Darryl J Lyle
Robert Walter
Bruce B
Ismael Montecel
M D
Andrew Richmond
Simon Oliphant
Mirik Gogri
David Hughes
Mark Daniel Cohen
Brandon Lattin
Yannick Weyns
Nickolas Andrew Freeman
Brian Blanchard
Shane Calimlim
Tybie Fitzhugh
Robert Ilardi
Eric Kiebler
Tatiana Vorovchenko
Craig Stonaha
Michael Conroy
Graydon Goss
Frederic Simon
Greg Smith
Sean Warniaha
Tonyface
John Robinson
A G
Kevin Lee
Adrian Hatch
Yurii Konovaliuk
John Funai
Cass Costello
Geoffrey Short
Bradley Jenkins
Kyle Hofer
Tim Stephani
Luaan
AlecZero
Malte Ubl
Aria Ahmad
Nick Virtue
Scott Gossett
David Bethala
Dan Warren
Patrick Sutton
John Griffith
Daniel Lyons
Josh Thomas
DFaulk
Kevin Warne
Andreas Nautsch
Brandon labonte