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Whenever we open a new window on the universe we discover something new. Whether it’s figuring out how to see to greater distances like with telescopes, or down to smaller size-scales like with microscopes, or perhaps expanding our vision to new wavelengths of light or via exotic means such as in neutrinos or gravitational waves. Well, the 2023 Nobel prize in physics has been awarded to three physicists for opening just such a new window—but it’s not a window to a new size scale or a new mode of seeing—-it’s for a new window in time. It’s for attosecond physics—the billionth of a billionth of a second that represents the timescale of the insides of atoms. This year’s Nobel in physics is for a microscope in time

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Hosted by Matt O’Dowd
Written by Fernando Franco Félix & Matt O’Dowd
Post Production by Leonardo Scholzer, Yago Ballarini & Stephanie Faria
Directed by Andrew Kornhaber
Associate Producer: Bahar Gholipour
Executive Producers: Eric Brown & Andrew Kornhaber
Executive in Charge for PBS: Maribel Lopez
Director of Programming for PBS: Gabrielle Ewing
Assistant Director of Programming for PBS: John Campbell

Spacetime is produced by Kornhaber Brown for PBS Digital Studios.
This program is produced by Kornhaber Brown, which is solely responsible for its content.
© 2023 PBS. All rights reserved.

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

Space Time Was Made Possible In Part By:

Big Bang Sponsors
Bryce Fort
Peter Barrett
David Neumann
Sean Maddox
Alexander Tamas
Morgan Hough
Juan Benet
Vinnie Falco
Fabrice Eap
Mark Rosenthal

Quasar Sponsors
Glenn Sugden
Alex Kern
Ethan Cohen
Stephen Wilcox
Mark Heising

Hypernova Sponsors
Stephen Spidle
Chris Webb
Ivari Tölp
Zachry Wilson
Kenneth See
Gregory Forfa
Bradley Voorhees
Scott Gorlick
Paul Stehr-Green
Ben Delo
Scott Gray
Антон Кочков
Robert Ilardi
John R. Slavik
Donal Botkin
Edmund Fokschaner
chuck zegar
Jordan Young

Gamma Ray Burst Sponsors
Leonardo Schulthais Senna
Lori Ferris
James Sadler
Dennis Van Hoof
Koen Wilde
Nicolas Katsantonis
Piotr Sarnicki
Massimiliano Pala
Thomas Nielson
Joe Pavlovic
Justin Lloyd
Chuck Lukaszewski
Cole B Combs
Andrea Galvagni
Jerry Thomas
Nikhil Sharma
Ryan Moser
John Anderson
David Giltinan
Scott Hannum
Bradley Ulis
Craig Falls
Kane Holbrook
Ross Story
Teng Guo
Mason Dillon
Matt Langford
Harsh Khandhadia
Susan Albee
Michael Lev
Terje Vold
James Trimmier
Jeremy Soller
Paul Wood
Joe Moreira
Kent Durham
Ramon Nogueira
The Mad Mechanic
Ellis Hall
John H. Austin, Jr.
Faraz Khan
Almog Cohen
Daniel Jennings
Russ Creech
Jeremy Reed
David Johnston
Michael Barton
Isaac Suttell
Oliver Flanagan
Bleys Goodson
Mark Delagasse
Mark Daniel Cohen
Shane Calimlim
Tybie Fitzhugh
Eric Kiebler
Craig Stonaha
Frederic Simon
Tonyface
John Robinson
Jim Hudson
Alex Gan
David Barnholdt
David Neal
John Funai
Bradley Jenkins
Vlad Shipulin
Cody Brumfield
Thomas Dougherty
King Zeckendorff
Dan Warren
Joseph Salomone
Patrick Sutton

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To understand where we came from—how earth, the solar system, the galaxy became what they are today—we need to understand the beginning of time. For example, how did the first galaxies pull themselves together from the dark universe-filling ocean of gas that followed the Big Bang? With the James Webb Space Telescope we’re starting to be able to find those first galaxies. It’s hard work because at those crazy distances all we see is tiny, faint and fuzzy blobs. If only we could see the individual stars in those galaxies we could learn so much more. Well, now using this one weird trick we can do exactly that. Or at least we have one lonely star at the end of the universe. But it won’t be lonely for long.

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Hosted by Matt O’Dowd
Written by Matt Caplan & Matt O’Dowd
Post Production by Leonardo Scholzer, Yago Ballarini & Stephanie Faria
Directed by Andrew Kornhaber
Associate Producer: Bahar Gholipour
Executive Producers: Eric Brown & Andrew Kornhaber
Executive in Charge for PBS: Maribel Lopez
Director of Programming for PBS: Gabrielle Ewing
Assistant Director of Programming for PBS: John Campbell

Spacetime is produced by Kornhaber Brown for PBS Digital Studios.
This program is produced by Kornhaber Brown, which is solely responsible for its content.
© 2023 PBS. All rights reserved.

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

Space Time Was Made Possible In Part By:

Big Bang Sponsors
Bryce Fort
Peter Barrett
David Neumann
Sean Maddox
Alexander Tamas
Morgan Hough
Juan Benet
Vinnie Falco
Fabrice Eap
Mark Rosenthal

Quasar Sponsors
Glenn Sugden
Alex Kern
Ethan Cohen
Stephen Wilcox
Mark Heising

Hypernova Sponsors
Stephen Spidle
Chris Webb
Ivari Tölp
Zachry Wilson
Kenneth See
Gregory Forfa
Bradley Voorhees
Scott Gorlick
Paul Stehr-Green
Ben Delo
Scott Gray
Антон Кочков
Robert Ilardi
John R. Slavik
Donal Botkin
Edmund Fokschaner
Chuck Zegar
Jordan Young
Daniel Muzquiz

Gamma Ray Burst Supporters
Lori Ferris
James Sadler
Dennis Van Hoof
Koen Wilde
Nicolas Katsantonis
Piotr Sarnicki
Massimiliano Pala
Thomas Nielson
Joe Pavlovic
Justin Lloyd
Chuck Lukaszewski
Cole B Combs
Andrea Galvagni
Jerry Thomas
Nikhil Sharma
Ryan Moser
John Anderson
David Giltinan
Scott Hannum
Bradley Ulis
Craig Falls
Kane Holbrook
Ross Story
teng guo
Mason Dillon
Matt Langford
Harsh Khandhadia
Thomas Tarler
Susan Albee
Matt Quinn
Michael Lev
Terje Vold
James Trimmier
Jeremy Soller
Paul Wood
Joe Moreira
Kent Durham
Ramon Nogueira
Ellis Hall
John H. Austin, Jr.
Diana S Poljar
Faraz Khan
Almog Cohen
Daniel Jennings
Russ Creech
Jeremy Reed
David Johnston
Michael Barton
Isaac Suttell
Oliver Flanagan
Bleys Goodson
Mark Delagasse
Mark Daniel Cohen
Shane Calimlim
Tybie Fitzhugh
Eric Kiebler
Craig Stonaha
Frederic Simon
John Robinson
Jim Hudson
Alex Gan
David Barnholdt
David Neal
John Funai
Bradley Jenkins
Vlad Shipulin
Cody Brumfield
Thomas Dougherty
King Zeckendorff
Dan Warren
Joseph Salomone
Patrick Sutton
Dean Faulk

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It’s hard to interpret the strange results of quantum mechanics, though many have tried. Interpretations range from the outlandish—like the multiple universes of Many Worlds, to the almost mundane, like the very mechanical Pilot Wave Theory. But perhaps we’re converging on an answer, because some are arguing that these two interpretations are really the same thing.

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Hosted by Matt O’Dowd
Written by Taha Dawoodbhoy & Matt O’Dowd
Post Production by Leonardo Scholzer, Yago Ballarini & Stephanie Faria
Directed by Andrew Kornhaber
Associate Producer: Bahar Gholipour
Executive Producers: Eric Brown & Andrew Kornhaber
Executive in Charge for PBS: Maribel Lopez
Director of Programming for PBS: Gabrielle Ewing
Assistant Director of Programming for PBS: John Campbell

Spacetime is produced by Kornhaber Brown for PBS Digital Studios.
This program is produced by Kornhaber Brown, which is solely responsible for its content.
© 2023 PBS. All rights reserved.

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

Space Time Was Made Possible In Part By:

Big Bang Sponsors
Bryce Fort
Peter Barrett
David Neumann
Sean Maddox
Alexander Tamas
Morgan Hough
Juan Benet
Vinnie Falco
Fabrice Eap
Mark Rosenthal

Quasar Sponsors
Glenn Sugden
Alex Kern
Ethan Cohen
Stephen Wilcox
Mark Heising

Hypernova Sponsors
Stephen Spidle
Chris Webb
Ivari Tölp
Zachry Wilson
Kenneth See
Gregory Forfa
drollere
Bradley Voorhees
Scott Gorlick
Paul Stehr-Green
Ben Delo
Scott Gray
Антон Кочков
Robert Ilardi
John R. Slavik
Donal Botkin
Edmund Fokschaner
chuck zegar
Jordan Young
Daniel Muzquiz

Gamma Ray Burst Sponsors
Lori Ferris
James Sadler
Dennis Van Hoof
Koen Wilde
Nicolas Katsantonis
Piotr Sarnicki
Massimiliano Pala
Thomas Nielson
Joe Pavlovic
Ryan McGaughy
Justin Lloyd
Chuck Lukaszewski
Cole B Combs
Andrea Galvagni
Jerry Thomas
Nikhil Sharma
Ryan Moser
John Anderson
David Giltinan
Scott Hannum
Bradley Ulis
Craig Falls
Kane Holbrook
Ross Story
teng guo
Mason Dillon
Matt Langford
Harsh Khandhadia
Thomas Tarler
Susan Albee
Frank Walker
Matt Quinn
Michael Lev
Terje Vold
James Trimmier
Jeremy Soller
Paul Wood
Joe Moreira
Kent Durham
Ramon Nogueira
Ellis Hall
John H. Austin, Jr.
Diana S Poljar
Faraz Khan
Almog Cohen
Daniel Jennings
Russ Creech
Jeremy Reed
David Johnston
Michael Barton
Isaac Suttell
Oliver Flanagan
Bleys Goodson
Mark Delagasse
Mark Daniel Cohen
Shane Calimlim
Eric Kiebler
Craig Stonaha
Frederic Simon
John Robinson
Jim Hudson
Alex Gan
David Barnholdt
David Neal
John Funai
Bradley Jenkins
Vlad Shipulin
Cody Brumfield
Thomas Dougherty
King Zeckendorff
Dan Warren
Joseph Salomone
Patrick Sutton
Dean Faulk

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Superconductive materials seem miraculous. Their resistanceless flow of electricity has been exploited in some powerful ways—from super-strong magnets used in MRIs, particle accelerators and fusion plants. And then there’s, their bizarre ability to levitate in magnetic fields. But the broader use of superconductors is limited because they need to be cooled to extremely low temperatures to work. But what if we could produce superconductivity at room temperature? It would change the world.

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Hosted by Matt O’Dowd
Written by Matt O’Dowd
Post Production by Leonardo Scholzer, Yago Ballarini, Adriano Leal & Stephanie Faria
Directed by Andrew Kornhaber
Associate Producer: Bahar Gholipour
Executive Producers: Eric Brown & Andrew Kornhaber
Executive in Charge for PBS: Maribel Lopez
Director of Programming for PBS: Gabrielle Ewing
Assistant Director of Programming for PBS: John Campbell

Spacetime is produced by Kornhaber Brown for PBS Digital Studios.
This program is produced by Kornhaber Brown, which is solely responsible for its content.
© 2023 PBS. All rights reserved.

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

Space Time Was Made Possible In Part By:

Big Bang Supporters
Bryce Fort
Peter Barrett
David Neumann
Sean Maddox
Alexander Tamas
Morgan Hough
Juan Benet
Vinnie Falco
Fabrice Eap
Mark Rosenthal

Quasar Supporters
Glenn Sugden
Alex Kern
Ethan Cohen
Stephen Wilcox
Mark Heising

Hypernova Supporters
Stephen Spidle
Chris Webb
Ivari Tölp
Zachary Wilson
Kenneth See
Gregory Forfa
Bradley Voorhees
Scott Gorlick
Paul Stehr-Green
Ben Delo
Scott Gray
Антон Кочков
Robert Ilardi
John R. Slavik
Donal Botkin
Edmund Fokschaner
chuck zegar
Jordan Young
Daniel Muzquiz

Gamma Ray Burst Supporters
Dennis Van Hoof
Koen Wilde
Nicolas Katsantonis
Piotr Sarnicki
Massimiliano Pala
Thomas Nielson
Joe Pavlovic
Ryan McGaughy
Justin Lloyd
Chuck Lukaszewski
Cole B Combs
Andrea Galvagni
Jerry Thomas
Nikhil Sharma
Ryan Moser
John Anderson
David Giltinan
Scott Hannum
Bradley Ulis
Craig Falls
Kane Holbrook
Ross Story
Teng Guo
Mason Dillon
Matt Langford
Harsh Khandhadia
Thomas Tarler
Susan Albee
Frank Walker
Michael Lev
Terje Vold
James Trimmier
Jeremy Soller
Andre Stechert
Paul Wood
Joe Moreira
Kent Durham
Ramon Nogueira
The Mad Mechanic
Ellis Hall
John H. Austin, Jr.
Diana S Poljar
Faraz Khan
Almog Cohen
Daniel Jennings
Russ Creech
Jeremy Reed
David Johnston
Michael Barton
Isaac Suttell
Oliver Flanagan
Bleys Goodson
Robert Walter
Mark Delagasse
Mark Daniel Cohen
Shane Calimlim
Eric Kiebler
Craig Stonaha
Frederic Simon
John Robinson
Jim Hudson
Alex Gan
David Barnholdt
David Neal
John Funai
Bradley Jenkins
Vlad Shipulin
Cody Brumfield
Thomas Dougherty
King Zeckendorff
Dan Warren
Joseph Salomone
Patrick Sutton
Dean Faulk

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

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In order to see the faint light from objects in deepest space, astronomers go to the darkest places on the planet. In order to listen to their quite radio signals, they head as far from any radio-noisy humans as possible. But there’s nowhere on the earth, or even orbiting the Earth, that’s far enough to hear to the faint radio hum from the time before stars. In fact, we may need to build a giant radio telescope in the quietest place in the solar system—the far side of the moon.

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Hosted by Matt O’Dowd
Written by Matt Caplan & Matt O’Dowd
Post Production by Leonardo Scholzer, Yago Ballarini, Adriano Leal & Stephanie Faria
Directed by Andrew Kornhaber
Associate Producer: Bahar Gholipour
Executive Producers: Eric Brown & Andrew Kornhaber
Executive in Charge for PBS: Maribel Lopez
Director of Programming for PBS: Gabrielle Ewing
Assistant Director of Programming for PBS: John Campbell

Spacetime is produced by Kornhaber Brown for PBS Digital Studios.
This program is produced by Kornhaber Brown, which is solely responsible for its content.
© 2023 PBS. All rights reserved.

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

Space Time Was Made Possible In Part By:

Big Bang Sponsor
Bryce Fort
Peter Barrett
David Neumann
Sean Maddox
Alexander Tamas
Morgan Hough
Juan Benet
Vinnie Falco
Fabrice Eap
Mark Rosenthal

Quasar Sponsor
Glenn Sugden
Alex Kern
Ethan Cohen
Stephen Wilcox
Mark Heising

Hypernova Sponsor
Stephen Spidle
Chris Webb
Ivari Tölp
Zachary Wilson
Kenneth See
Gregory Forfa
Bradley Voorhees
Scott Gorlick
Paul Stehr-Green
Ben Delo
Scott Gray
Антон Кочков
Robert Ilardi
John R. Slavik
Mathew Handugan
Donal Botkin
Edmund Fokschaner
chuck zegar
Jordan Young
Daniel Muzquiz

Gamma Ray Burst Sponsors
Koen Wilde
Nicolas Katsantonis
Robin Bayley
Piotr Sarnicki
Massimiliano Pala
Thomas Nielson
Joe Pavlovic
Ryan McGaughy
Chuck Lukaszewski
Edward Hodapp
Cole B Combs
Andrea Galvagni
Jerry Thomas
Nikhil Sharma
Ryan Moser
John Anderson
David Giltinan
Scott Hannum
Bradley Ulis
Craig Falls
Kane Holbrook
Ross Story
Teng Guo
Mason Dillon
Matt Langford
Harsh Khandhadia
Thomas Tarler
Susan Albee
Frank Walker
Matt Quinn
Michael Lev
Terje Vold
James Trimmier
Jeremy Soller
Andre Stechert
Paul Wood
Joe Moreira
Kent Durham
Ramon Nogueira
The Mad Mechanic
Ellis Hall
John H. Austin, Jr.
Diana S Poljar
Faraz Khan
Almog Cohen
Daniel Jennings
Cameron Sampson
Russ Creech
Jeremy Reed
David Johnston
Michael Barton
Andrew Mann
Isaac Suttell
Oliver Flanagan
Bleys Goodson
Robert Walter
Mark Delagasse
Mark Daniel Cohen
Shane Calimlim
Eric Kiebler
Craig Stonaha
Frederic Simon
Dmitri McGuiness
John Robinson
Jim Hudson
Alex Gan
David Barnholdt
David Neal
John Funai
Bradley Jenkins
Vlad Shipulin
Cody Brumfield
Thomas Dougherty
King Zeckendorff
Dan Warren
Joseph Salomone
Patrick Sutton
Dean Faulk

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Spacetime on its smallest scales is a seething ocean of black holes and wormholes flickering into and out of existence—or so many physicists think has to be the case. But why should we take this spacetime foam seriously if we’ve never seen any evidence of it?

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Hosted by Matt O’Dowd
Written by Christopher Pollack & Matt O’Dowd
Post Production by Leonardo Scholzer, Yago Ballarini, Adriano Leal & Stephanie Faria
Directed by Andrew Kornhaber
Associate Producer: Bahar Gholipour
Executive Producers: Eric Brown & Andrew Kornhaber
Executive in Charge for PBS: Maribel Lopez
Director of Programming for PBS: Gabrielle Ewing
Assistant Director of Programming for PBS: John Campbell

Spacetime is produced by Kornhaber Brown for PBS Digital Studios.
This program is produced by Kornhaber Brown, which is solely responsible for its content.
© 2023 PBS. All rights reserved.

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

Space Time Was Made Possible In Part By:

Big Bang Sponsors
Bryce Fort
Peter Barrett
David Neumann
Sean Maddox
Alexander Tamas
Morgan Hough
Juan Benet
Vinnie Falco
Fabrice Eap
Mark Rosenthal

Quasar Sponsors
Glenn Sugden
Alex Kern
Ethan Cohen
Stephen Wilcox
Mark Heising

Hypernova Sponsors
Stephen Spidle
Chris Webb
Ivari Tölp
Zachry Wilson
Kenneth See
Gregory Forfa
Joe Moreira
Bradley Voorhees
Scott Gorlick
Paul Stehr-Green
Ben Delo
Scott Gray
Антон Кочков
Robert Ilardi
John R. Slavik
Mathew
Donal Botkin
Edmund Fokschaner
chuck zegar
Jordan Young
Daniel Muzquiz

Gamma Ray Burst
Nicolas Katsantonis
Robin Bayley
Piotr Sarnicki
Massimiliano Pala
Thomas Nielson
Joe Pavlovic
Ryan McGaughy
Chuck Lukaszewski
Edward Hodapp
Cole B. Combs
Andrea Galvagni
Jerry Thomas
Nikhil Sharma
Ryan Moser
John Anderson
David Giltinan
Scott Hannum
Bradley Ulis
Craig Falls
Vivaan Vaka
Kane Holbrook
Ross Story
teng guo
Mason Dillon
Matt Langford
Harsh Khandhadia
Thomas Tarler
Susan Albee
Frank Walker
Matt Quinn
Michael Lev
Terje Vold
James Trimmier
Jeremy Soller
Andre Stechert
Paul Wood
Kent Durham
Ramon Nogueira
Ellis Hall
John H. Austin, Jr.
Diana S Poljar
Faraz Khan
Almog Cohen
Daniel Jennings
Cameron Sampson
Russ Creech
Jeremy Reed
David Johnston
Michael Barton
Andrew Mann
Isaac Suttell
Oliver Flanagan
Bleys Goodson
Robert Walter
Mark Delagasse
Mark Daniel Cohen
Nickolas Andrew Freeman
Shane Calimlim
Tybie Fitzhugh
Eric Kiebler
Craig Stonaha
Frederic Simon
Tonyface
John Robinson
Alex Gan
David Barnholdt
David Neal
John Funai
Bradley Jenkins
Vlad Shipulin
Cody Brumfield
Thomas Dougherty
King Zeckendorff
Dan Warren
Joseph Salomone
Patrick Sutton
John Griffith
Dean Faulk

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

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We have no idea what dark matter is, other than it’s some source of gravity that is completely invisible but exerts way more pull that all of the regular matter. More than all of the stars, all of the gas, all of the black holes…unless dark matter is black holes, then black holes are most of everything. Dark matter constitutes 80% or so of the mass in the universe, which means even our Milky Way galaxy is mostly a vast ball of dark matter that happens to have attracted a relative sprinkling of baryons—atoms in the form of gas, which lit up as starry glitter spinning in the middle of this invisible gravitational well.

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Hosted by Matt O’Dowd
Written by Taha Dawoodbhoy & Matt O’Dowd
Post Production by Leonardo Scholzer, Yago Ballarini, Adriano Leal & Stephanie Faria
Directed by Andrew Kornhaber
Associate Producer: Bahar Gholipour
Executive Producers: Eric Brown & Andrew Kornhaber
Executive in Charge for PBS: Maribel Lopez
Director of Programming for PBS: Gabrielle Ewing
Assistant Director of Programming for PBS: John Campbell

Spacetime is produced by Kornhaber Brown for PBS Digital Studios.
This program is produced by Kornhaber Brown, which is solely responsible for its content.
© 2023 PBS. All rights reserved.

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

Space Time Was Made Possible In Part By:

Big Bang Supporters
Bryce Fort
Peter Barrett
David Neumann
Sean Maddox
Alexander Tamas
Morgan Hough
Juan Benet
Vinnie Falco
Fabrice Eap
Mark Rosenthal

Quasar Supporters
Glenn Sugden
Alex Kern
Ethan Cohen
Stephen Wilcox
Christina Oegren
Mark Heising

Hypernova Supporters
Stephen Spidle
Chris Webb
Ivari Tölp
Zachary Wilson
Kenneth See
Gregory Forfa
Kirk Honour
Joe Moreira
Bradley Voorhees
Marc Armstrong
Scott Gorlick
Paul Stehr-Green
Ben Delo
Scott Gray
Антон Кочков
Robert Ilardi
John R. Slavik
Donal Botkin
John Pollock
Edmund Fokschaner
Chuck Zegar
Jordan Young
Daniel Muzquiz

Gamma Ray Burst
Robin Bayley
Piotr Sarnicki
Massimiliano Pala
Thomas Nielson
Joe Pavlovic
Ryan McGaughy
Chuck Lukaszewski
Edward Hodapp
Cole Combs
Andrea Galvagni
Jerry Thomas
Nikhil Sharma
Ryan Moser
John Anderson
David Giltinan
Scott Hannum
Bradley Ulis
Craig Falls
Vivaan Vaka
Kane Holbrook
Ross Story
Teng Guo
Mason Dillon
Matt Langford
Harsh Khandhadia
Thomas Tarler
Susan Albee
Frank Walker
Matt Quinn
Michael Lev
Terje Vold
James Trimmier
Jeremy Soller
Andre Stechert
Paul Wood
Kent Durham
Ramon Nogueira
Paul Suchy
Ellis Hall
John H. Austin, Jr.
Diana S Poljar
Faraz Khan
Almog Cohen
Daniel Jennings
Cameron Sampson
Jeremy Reed
David Johnston
Michael Barton
Andrew Mann
Isaac Suttell
Bleys Goodson
Robert Walter
Mark Delagasse
Mark Daniel Cohen
Nickolas Andrew Freeman
Shane Calimlim
Tybie Fitzhugh
Eric Kiebler
Craig Stonaha
Graydon Goss
Frederic Simon
Dmitri McGuiness
John Robinson
Jim Hudson
Alex Gan
David Barnholdt
David Neal
John Funai
Bradley Jenkins
Jiri Borkovec
Vlad Shipulin
Cody Brumfield
Thomas Dougherty
King Zeckendorff
Dan Warren
Patrick Sutton
John Griffith
Dean Faulk

Learn More About Opera One: https://opr.as/Opera-browser-PBS-Space-Time

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A few weeks ago a large team of gravitational wave astronomers announced something pretty wild. The moderately confident detection of pervasive ripples in the fabric of space time that presumably fills the cosmos, detected by watching for subtle connections between the signals from rapidly spinning cores of dead stars in our galactic neighborhood. In other words, the gravitational wave background has probably been detected using a pulsar timing array.

Thumbnail Image Illustration Credit: Olena Shmahalo for NANOGrav

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Hosted by Matt O’Dowd
Written by Matt O’Dowd
Post Production by Leonardo Scholzer, Yago Ballarini, Adriano Leal & Stephanie Faria
Directed by Andrew Kornhaber
Associate Producer: Bahar Gholipour
Executive Producers: Eric Brown & Andrew Kornhaber
Executive in Charge for PBS: Maribel Lopez
Director of Programming for PBS: Gabrielle Ewing
Assistant Director of Programming for PBS: John Campbell

Spacetime is produced by Kornhaber Brown for PBS Digital Studios.
This program is produced by Kornhaber Brown, which is solely responsible for its content.
© 2023 PBS. All rights reserved.

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

Space Time Was Made Possible In Part By:

Big Bang Sponsors
Bryce Fort
Peter Barrett
David Neumann
Sean Maddox
Alexander Tamas
Morgan Hough
Juan Benet
Vinnie Falco
Fabrice Eap
Mark Rosenthal

Quasar Sponsors
Glenn Sugden
Alex Kern
Ethan Cohen
Stephen Wilcox
Christina Oegren
Mark Heising

Hypernova Sponsors
Stephen Spidle
Chris Webb
Ivari Tölp
Zachary Wilson
Kenneth See
Gregory Forfa
Kirk Honour
Joe Moreira
Bradley Voorhees
Marc Armstrong
Scott Gorlick
Paul Stehr-Green
Ben Delo
Scott Gray
Антон Кочков
Robert Ilardi
John R. Slavik
Donal Botkin
John Pollock
Edmund Fokschaner
Chuck Zegar
Jordan Young
Daniel Muzquiz

Gamma Ray Burst Supporters
Robin Bayley
Piotr Sarnicki
Massimiliano Pala
Thomas Nielson
Joe Pavlovic
Ryan McGaughy
Chuck Lukaszewski
Edward Hodapp
Cole Combs
Andrea Galvagni
Jerry Thomas
Nikhil Sharma
Ryan Moser
John Anderson
David Giltinan
Scott Hannum
Bradley Ulis
Craig Falls
Vivaan Vaka
Kane Holbrook
Ross Story
Teng Guo
Mason Dillon
Matt Langford
Harsh Khandhadia
Thomas Tarler
Susan Albee
Frank Walker
Matt Quinn
Michael Lev
Terje Vold
James Trimmier
Jeremy Soller
Andre Stechert
Paul Wood
Kent Durham
Ramon Nogueira
Paul Suchy
Ellis Hall
John H. Austin, Jr.
Diana S Poljar
Faraz Khan
Almog Cohen
Daniel Jennings
Cameron Sampson
Jeremy Reed
David Johnston
Michael Barton
Andrew Mann
Isaac Suttell
Bleys Goodson
Robert Walter
Mark Delagasse
Mark Daniel Cohen
Nickolas Andrew Freeman
Shane Calimlim
Tybie Fitzhugh
Eric Kiebler
Craig Stonaha
Graydon Goss
Frederic Simon
Dmitri McGuiness
John Robinson
Jim Hudson
Alex Gan
David Barnholdt
David Neal
John Funai
Bradley Jenkins
Jiri Borkovec
Vlad Shipulin
Cody Brumfield
Thomas Dougherty
King Zeckendorff
Dan Warren
Patrick Sutton
John Griffith
Dean Faulk
00:00 Introduction
01:02 Relativity and Gravitational Waves
02:21 Discovering Gravitational Waves
03:49 Gravitational Waves & Pulsars
05:04 Pulsar Timing Array Discovers GWB
06:48 Understanding the GWB
07:55 Are Pulsars Seeing Gravitational Waves?
09:00 Correlated & Anti-Correlated Pulsar Rates
10:07 Hellings and Downs Curve
11:44 Binary Supermassive Black Holes
13:39 NANOgrav Frequency Spectrum

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One of the most fundamental physics facts is that the speed of light in a vacuum is constant for all observers. But can we really be sure that the speed of light wasn’t different in the past, or perhaps in other parts of the universe? In fact, variable speed of light theories have long been used to try to explain everything from dark energy to gravity itself. Let’s explore how constant this fundamental constant really is.

All Previous Episodes Referenced
https://www.youtube.com/watch?v=msVuCEs8Ydo&list=PLsPUh22kYmNCJOQ2p5hvrU-sqOxTAK7nc&ab_channel=PBSSpaceTime

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Hosted by Matt O’Dowd
Written by Fernando Franco Félix & Matt O’Dowd
Post Production by Leonardo Scholzer, Yago Ballarini, Adriano Leal & Stephanie Faria
Directed by Andrew Kornhaber
Associate Producer: Bahar Gholipour
Executive Producers: Eric Brown & Andrew Kornhaber
Executive in Charge for PBS: Maribel Lopez
Director of Programming for PBS: Gabrielle Ewing
Assistant Director of Programming for PBS: John Campbell

Spacetime is produced by Kornhaber Brown for PBS Digital Studios.
This program is produced by Kornhaber Brown, which is solely responsible for its content.
© 2023 PBS. All rights reserved.

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

Space Time Was Made Possible In Part By:
Big Bang Sponsors
Bryce Fort
Peter Barrett
David Neumann
Sean Maddox
Alexander Tamas
Morgan Hough
Juan Benet
Vinnie Falco
Fabrice Eap
Mark Rosenthal

Quasar Sponsors
Glenn Sugden
Alex Kern
Ethan Cohen
Stephen Wilcox
Christina Oegren
Mark Heising

Hypernova Sponsors
Stephen Spidle
Chris Webb
Ivari Tölp
Zacahary Wilson
Kenneth See
Gregory Forfa
Kirk Honour
Joe Moreira
Bradley Voorhees
Marc Armstrong
Scott Gorlick
Paul Stehr-Green
Ben Delo
Scott Gray
Антон Кочков
Robert Ilardi
John R. Slavik
Donal Botkin
John Pollock
Edmund Fokschaner
chuck zegar
Jordan Young
Daniel Muzquiz
Gamma Ray Burst Sponsors
Jakub Jasinski
Robin Bayley
Piotr Sarnicki
Massimiliano Pala
Thomas Nielson
Joe Pavlovic
Ryan McGaughy
Chuck Lukaszewski
Edward Hodapp
Cole Combs
Andrea Galvagni
Jerry Thomas
Nikhil Sharma
Ryan Moser
John Anderson
David Giltinan
Scott Hannum
Bradley Ulis
Craig Falls
Vivaan Vaka
Kane Holbrook
Ross Story
teng guo
Mason Dillon
Matt Langford
Harsh Khandhadia
Thomas Tarler
Susan Albee
Frank Walker
Matt Quinn
Michael Lev
Terje Vold
James Trimmier
Andre Stechert
Paul Wood
Kent Durham
Ramon Nogueira
Paul Suchy
Ellis Hall
John H. Austin, Jr.
Diana S Polijar
Faraz Khan
Almog Cohen
Alex Edwards
Daniel Jennings
Cameron Sampson
Jeremy Reed
David Johnston
Michael Barton
Andrew Mann
Isaac Suttell
Bleys Goodson
Robert Walter
Mark Delagasse
Mark Daniel Cohen
Nickolas Andrew Freeman
Shane Calimlim
Tybie Fitzhugh
Eric Kiebler
Craig Stonaha
Graydon Goss
Frederic Simon
Dmitri McGuiness
John Robinson
Jim Hudson
Alex Gan
David Barnholdt
David Neal
John Funai
Bradley Jenkins
Jiri Borkovec
Vlad Shipulin
Cody Brumfield
Thomas Dougherty
King Zeckendorff
Dan Warren
Patrick Sutton
John Griffith
Dean Faulk
00:00 Introduction
00:31 Light & Relativity
01:49 Is the Speed of Light Invariant?
05:13 First VSL Theory
06:43 VSL & The Horizon Problem
09:09 Moffat’s VSL Proposal
09:46 Albercht & Mageuijo’s VSL
10:37 Are VSL Theories Testable?
12:58 VSL & Refractive Index of the Universe
13:56 Is there VSL Evidence?
14:51 Comments

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

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Quantum mechanics is our best theory of the fundamental nature of reality, but it’s usually only distinguishable from familiar classical mechanics on the smallest scales. However, there are some fringe cases where its distinct features manifest on scales we can observe—in things like superfluids, or the interiors of collapsed stars. But it’s also possible that our entire galaxy is filled with a reverberating quantum mechanical wave that literally holds the galaxy together—and in fact explains all the dark matter that we see across the universe. And this isn’t even a fringe theory. It’s axionic dark matter.

Check out the Space Time Merch Store
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Search the Entire Space Time Library Here: https://search.pbsspacetime.com/

Hosted by Matt O’Dowd
Written by Taha Dawoodbhoy & Matt O’Dowd
Post Production by Leonardo Scholzer, Yago Ballarini, Adriano Leal & Stephanie Faria
Directed by Andrew Kornhaber
Associate Producer: Bahar Gholipour
Executive Producers: Eric Brown & Andrew Kornhaber
Executive in Charge for PBS: Maribel Lopez
Director of Programming for PBS: Gabrielle Ewing
Assistant Director of Programming for PBS: John Campbell

Spacetime is produced by Kornhaber Brown for PBS Digital Studios.
This program is produced by Kornhaber Brown, which is solely responsible for its content.
© 2023 PBS. All rights reserved.

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

Space Time Was Made Possible In Part By:

Big Bang Supporters
Bryce Fort
Peter Barrett
David Neumann
Sean Maddox
Alexander Tamas
Morgan Hough
Juan Benet
Vinnie Falco
Fabrice Eap
Mark Rosenthal

Quasar Supporters
Vivaan Vaka
Glenn Sugden
Alex Kern
Ethan Cohen
Stephen Wilcox
Christina Oegren
Mark Heising

Hypernova Supporters
Stephen Spidle
Chris Webb
Ivari Tölp
Zachary Wilson
Kenneth See
Gregory Forfa
Kirk Honour
Joe Moreira
Bradley Voorhees
Marc Armstrong
Scott Gorlick
Paul Stehr-Green
Ben Delo
Scott Gray
Антон Кочков
Robert Ilardi
John R. Slavik
Donal Botkin
John Pollock
Edmund Fokschaner
chuck zegar
Jordan Young
Daniel Muzquiz

Gamma Ray Burst Supporters
Jakub Jasinski
Robin Bayley
Piotr Sarnicki
Matthew Oldfield
Massimiliano Pala
Thomas Nielson
Joe Pavlovic
Ryan McGaughy
Chuck Lukaszewski
Edward Hodapp
Cole B. Combs
Andrea Galvagni
Jerry Thomas
Nikhil Sharma
Ryan Moser
John Anderson
David Giltinan
Scott Hannum
Bradley Ulis
Craig Falls
Kane Holbrook
Ross Story
teng guo
Mason Dillon
Matt Langford
Harsh Khandhadia
Thomas Tarler
Susan Albee
Frank Walker
Matt Quinn
Michael Lev
Terje Vold
James Trimmier
Andre Stechert
Paul Wood
Kent Durham
Ramon Nogueira
Paul Suchy
Ellis Hall
John H. Austin, Jr.
Diana S Poljar
Faraz Khan
Almog Cohen
Alex Edwards
Daniel Jennings
Cameron Sampson
Jeremy Reed
David Johnston
Michael Barton
Andrew Mann
Isaac Suttell
Bleys Goodson
Robert Walter
Mark Delagasse
Mark Daniel Cohen
Nickolas Andrew Freeman
Shane Calimlim
Tybie Fitzhugh
Eric Kiebler
Craig Stonaha
Graydon Goss
Frederic Simon
Dmitri McGuiness
John Robinson
Jim Hudson
Alex Gan
David Barnholdt
David Neal
John Funai
Bradley Jenkins
Vlad Shipulin
Cody Brumfield
Thomas Dougherty
King Zeckendorff
Dan Warren
Patrick Sutton
John Griffith
Dean Faulk