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If you’ve studied any physics you know that like charges repel and opposite charges attract. But why? It’s as though this thing – electric charge – is as fundamental a property of an object as its mass. It just sort of … is. Well it turns out if you dig deep enough, the fundamental-ness of charge unravels, and in many things, including mass itself, are unraveled with it.

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Spacetime is produced by Kornhaber Brown for PBS Digital Studios.
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At just four light years away, Proxima Centauri is our closest solar neighbor. The recent discovery of the new exoplanet Proxima D, has reopened the discussion of whether the proxima system is our best chance at reaching another Earth. How did we discover Proxima D? How do we know what the conditions are on planets so far away? Watch the episode to learn more.

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Assistant Producer: Setare Gholipour
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Reality has cracks in it. Universe-spanning filaments of ancient Big Bang energy, formed from topological defects in the quantum fields, aka cosmic strings. They have subatomic thickness but prodigious mass and they lash through space at a close to the speed of light. They could be the most bizarre undiscovered entities that actually exist.

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Hosted by Matt O’Dowd
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GFX Visualizations: Ajay Manuel
Directed by Andrew Kornhaber
Assistant Producer: Setare Gholipour
Executive Producers: Eric Brown & Andrew Kornhaber
Executives in Charge (PBS): Adam Dylewski, Maribel Lopez
Director of Programming (PBS): Gabrielle Ewing

Spacetime is produced by Kornhaber Brown for PBS Digital Studios.
This program is produced by Kornhaber Brown, which is solely responsible for its content.
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End Credits Music by J.R.S. Schattenberg: https://www.youtube.com/user/MultiDroideka

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Objective Collapse Theories offer a explanation of quantum mechanics that is at once brand new and based in classical mechanics. In the world of quantum mechanics, it’s no big deal for particles to be in multiple different states at the same time, or to teleport between locations, or to influence each other faster than light. But somehow, none of this strangeness makes its way to the familiar scale of human beings – even though our world is made entirely of quantum-weird building blocks. The explanations of this transition range from the mystical influence of the conscious mind to the grandiose proposition of multiple realities. But Objective Collapse Theories feels as down to earth as the classical world that we’re trying to explain. Let’s see if it makes any sense.

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Spacetime is produced by Kornhaber Brown for PBS Digital Studios.
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On February 10th, 5pm EST Matt will answer the space time community’s top questions on the nature of space and the nature of time!

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Fact: in a black hole, all of the mass is concentrated at the singularity at the very center. Fact: every black hole singularity is surrounded by an event horizon. Nothing can escape from within the event horizon unless it can travel faster than light. Fact: gravity travels at the speed of light. So how does a black hole manage to communicate its gravitational force to the outside universe? How does gravity escape a black hole?

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Executives in Charge (PBS): Adam Dylewski, Maribel Lopez
Director of Programming (PBS): Gabrielle Ewing

Spacetime is produced by Kornhaber Brown for PBS Digital Studios.
This program is produced by Kornhaber Brown, which is solely responsible for its content.
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End Credits Music by J.R.S. Schattenberg: https://www.youtube.com/user/MultiDroideka

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We routinely simulate the universe on all of its scales, from planets to large fractions of the cosmos. Today we’re going to see how it’s possible to build a universe in a computer – and see whether there’s a limit to what we can simulate.

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GFX Visualizations: Ajay Manuel
Directed by Andrew Kornhaber
Assistant Producer: Setare Gholipour
Executive Producers: Eric Brown & Andrew Kornhaber
Executives in Charge (PBS): Adam Dylewski, Maribel Lopez
Director of Programming (PBS): Gabrielle Ewing

Spacetime is produced by Kornhaber Brown for PBS Digital Studios.
This program is produced by Kornhaber Brown, which is solely responsible for its content.
© 2021 PBS. All rights reserved.

End Credits Music by J.R.S. Schattenberg: https://www.youtube.com/user/MultiDroideka

Special Thanks to Our Patreon Supporters

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If you used every particle in the observable universe to do a full quantum simulation, how big would that simulation be? At best a large molecule. That’s how insanely information dense the quantum wavefunction really is. And yet we routinely simulate systems with thousands, even millions of particles. How? By cheating. Using the ultimate compression algorithm: Density Functional Theory (DFT). Let’s learn how to cheat the universe.

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Hosted by Matt O’Dowd
Written by Graeme Gossel & Matt O’Dowd
Post Production by Leonardo Scholzer, Yago Ballarini, Pedro Osinski, Adriano Leal & Stephanie Faria
GFX Visualizations: Ajay Manuel
Directed by Andrew Kornhaber
Assistant Producer: Setare Gholipour
Executive Producers: Eric Brown & Andrew Kornhaber
Executives in Charge (PBS): Adam Dylewski, Maribel Lopez
Director of Programming (PBS): Gabrielle Ewing

Spacetime is produced by Kornhaber Brown for PBS Digital Studios.
This program is produced by Kornhaber Brown, which is solely responsible for its content.
© 2021 PBS. All rights reserved.

End Credits Music by J.R.S. Schattenberg: https://www.youtube.com/user/MultiDroideka

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On our search for alien lifeforms we scan for primitive biosignatures, and wait and hope for their errant signals to happen by the Earth. But that may not be the best way. Any energy-hungry civilization more advanced than our own may leave an indisputable technological mark on the galaxy. And yes, we’re very actively searching for those also. Time to update you on the hunt for galactic empires.

Check out the Space Time Merch Store
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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
Post Production by Leonardo Scholzer, Yago Ballarini, Pedro Osinski, Adriano Leal & Stephanie Faria
GFX Visualizations: Ajay Manuel
Directed by: Andrew Kornhaber
Assistant Producer: Setare Gholipour
Executive Producers: Eric Brown & Andrew Kornhaber
Executives in Charge (PBS): Adam Dylewski, Maribel Lopez
Director of Programming (PBS): Gabrielle Ewing

Spacetime is produced by Kornhaber Brown for PBS Digital Studios.
This program is produced by Kornhaber Brown, which is solely responsible for its content.
© 2021 PBS. All rights reserved.

End Credits Music by J.R.S. Schattenberg: https://www.youtube.com/user/MultiDroideka

Special Thanks to Our Patreon Supporters

Big Bang Supporters
David Taiclet
Ben Dimock
Daniel Alexiuc
Nenado763
Pravin Mansukhani
Peter Barrett
Nils Anderson
David Neumann
Charlie
Leo Koguan
Sandy Wu
Matthew Miller
Ahmad Jodeh
Alexander Tamas
Morgan Hough
Juan Benet
Vinnie Falco
Fabrice Eap
Mark Rosenthal
David Nicklas
Henry Van Styn

Quasar Supporters
Alex Kern
Michael Schneider
Ethan Cohen
Stephen Wilcox
Yogi B
Christina Oegren
Mark Heising
Hank S

Hypernova Supporters
william bryan
drollere
Joe Moreira
Marc Armstrong
Scott Gorlick
Nick Berard
Paul Stehr-Green
Alexander Price
MuON Marketing
Russell Pope
Ben Delo
Nicholas Newlin
Scott Gray
Антон Кочков
John R. Slavik
Mathew
Donal Botkin
John Pollock
Edmund Fokschaner
Joseph Salomone
chuck zegar
Jordan Young
m0nk
Daniel Muzquiz
Timothy McCulloch

Gamma Ray Burst Supporters
Kory Kirk
Terje Vold
Jered D Sweeney
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comboy
Brett Baker
Jeremy Soller
Jonathan Conerly
Andre Stechert
Ross Bohner
Paul Wood
Kent Durham
jim bartosh
Nubble
Chris Navrides
Scott R Calkins
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The Mad Mechanic
Ellis Hall
John H. Austin, Jr.
Diana S
Ben Campbell
Lawrence Tholl, DVM
Faraz Khan
Almog Cohen
Alex Edwards
Ádám Kettinger
MD3
Endre Pech
Daniel Jennings
Cameron Sampson
Pratik Mukherjee
Geoffrey Clarion
Nate
Darren Duncan
Russ Creech
Jeremy Reed
Eric Webster
David Johnston
J. King
Michael Barton
Christopher Barron
James Ramsey
Justin Jermyn
Mr T
Andrew Mann
Isaac Suttell
Devon Rosenthal
Oliver Flanagan
Bleys Goodson
Robert Walter
Bruce B
Ismael Montecel
Simon Oliphant
Mirik Gogri
Mark Delagasse
Mark Daniel Cohen
Brandon Lattin
Nickolas Andrew Freeman
Roy Frank Sproule III
Shane Calimlim
Tybie Fitzhugh
Robert Ilardi
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Craig Stonaha
Martin Skans
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Graydon Goss
Frederic Simon
Tonyface
John Robinson
A G
Kevin Lee
justahat
John Funai
Cass Costello
Tristan Deloche
Bradley Jenkins
Kyle Hofer
Daniel Stříbrný
Luaan
AlecZero
Vlad Shipulin
Cody
Malte Ubl
King Zeckendorff
Nick Virtue
Scott Gossett
Dan Warren
Patrick Sutton
John Griffith
Daniel Lyons
DFaulk
GrowingViolet
Kevin Warne
Andreas Nautsch