Will The Big Bang Happen AGAIN (and Again)?

Sign Up on Patreon to get access to the Space Time Discord!

How did the universe begin? How can something come from nothing? One way to “solve” this most difficult of philosophical conundrums is to avoid it altogether. Maybe the universe didn’t begin. Maybe the Big Bang was just one in an endless cycle.

Check out the Space Time Merch Store

Sign up for the mailing list to get episode notifications and hear special announcements!

Hosted by Matt O'Dowd
Written by Richard Dyer & Matt O'Dowd
Post Production by Leonardo Scholzer, Yago Ballarini & Stephanie Faria
Directed by Andrew Kornhaber
Associate Producer: Bahar Gholipour
Executive Producer: 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 a production of Kornhaber Brown for PBS Digital Studios.
This program is produced by Kornhaber Brown, which is solely responsible for its content.
© 2024 PBS. All rights reserved.

Space Time Was Made Possible In Part By:
Big Bang
Wojciech Szymski
Bryce Fort
Peter Barrett
Alexander Tamas
Morgan Hough
Juan Benet
Vinnie Falco
Mark Rosenthal

Supernova
Grace Biaelcki
Glenn Sugden
Ethan Cohen
Stephen Wilcox
The Tyacke boys
Mark Heising

Hypernova
Ulrich and Alexandre Francois
Spencer Jones
Dean Galvin
Michael Tidwell
Stephen Spidle
Massimiliano Pala
Justin Lloyd
David Giltinan
Kenneth See
Gregory Forfa
Alex Kern
Scott Gorlick
Paul Stehr-Green
Ben Delo
Scott Gray
Антон Кочков
Robert Ilardi
John R. Slavik
Donal Botkin
chuck zegar
Daniel Muzquiz

Gamma Ray Burst
Bryan White
Eric Raschke
Aaron Pinto
Kacper Cieśla
Satwik Pani
Param Saxena
John De Witt
Nathaniel Bennett
Sandhya Devi
Michael Oulvey
Arko Provo Mukherjee
Mike Purvis
Christopher Wade
Anthony Crossland
Grace Seraph
Stephen Saslow
Robert DeChellis
Tomaz Lovsin
Anthony Leon
Lori Ferris
Koen Wilde
Nicolas Katsantonis
Richard Steenbergen
Joe Pavlovic
Chuck Lukaszewski
Cole B. Combs
Jerry Thomas
Nikhil Sharma
John Anderson
Bradley Ulis
Craig Falls
Kane Holbrook
Ross Story
Harsh Khandhadia
Matt Quinn
Michael Lev
Rad Antonov
Terje Vold
James Trimmier
Jeremy Soller
Paul Wood
Kent Durham
Jim Bartosh
John H. Austin, Jr.
Faraz Khan
Almog Cohen
Daniel Jennings
David Johnston
Michael Barton
Isaac Suttell
Bleys Goodson
Mark Delagasse
Mark Daniel Cohen
Shane Calimlim
Tybie Fitzhugh
Eric Kiebler
Craig Stonaha
Frederic Simon
Jim Hudson
Michael Purcell
John Funai
Adrien Molyneux
Bradley Jenkins
Vlad Shipulin
Justin Waters
Thomas Dougherty
Zac Sweers
Dan Warren
Joseph Salomone

[TEDEd]

Happy 10th, Matt & team! Definitely one of the best channels in the Universe. Thanks for all you do.

[armagetronfasttrack]

I've been watching since the very beginning, starting near the end of high school, and have watched 95+% of the videos since then. I'm now doing a PhD in chemical physics and a lot of my interest and broad-view understanding of physics has come from this channel. Really the best Youtube channel of all time, even among all the other great science/math/tech channels out there.

[DavidBeaumont]

"The speed of light is not about light" was probably the first video I remember seeing, then I was hooked and I don't think I've missed one since.

[martinmacphail]

ok the pause for "and that journey....continues" was the most suspense i've felt in years. I've been on this ride for 4 years! Please make this show forever

[sthomas]

I'm 57, a retired aerospace engineer. I've been watching for a while but probably not from the beginning, maybe 8 or 9 years. I'd guess that I've watched just about all the videos, some multiple times. I also share them with my sons sometimes (both in college).

[jessicasq]

I’ve been watching since 2015! From being a high schooler learning about physics for the first time to then getting my BS in Physics with a concentration in Astrophysics and now getting a PhD in Physics, Space Time has been with me through it all! My favorite memories are from when I was taking my first Cosmology and Relativity classes and then coming home and watching videos while doing homework. I love this channel so much! Please never stop making videos.

[patromo]

I've been watching since Gabe was the host. I got one mention for a question I posted from Matt in maybe 2017. Blew my mind! Thanks Spacetime team.

[Danealor]

I'm here all the way back from Gabe's video explaining the tides, I remember talking to my AP Physics teacher about that at the time. Since then I'm pretty sure I've watched almost every SpaceTime video as it's come out. I've never lost my fascination for physics and still try to keep up even though I ended up in software professionally. This channel is an extremely rare example on this platform of a professional, visually evocative production that teaches science with minimal compromise. It'll keep my viewership and support for years to come!

[EthanHaluzaDelay]

PBS Space Time has been my favourite YouTube channel for at least nine years. The balance of rigour and accessibilty makes it the best physics content online. Heres to ten more years!

[christianbarger]

1:24 I've been watching since the 1st episode! Yea, 10

[irenelm]

I'm 54 and I watch you from Spain since 2023. I am a secretary but I love Cosmos and Physics since I was a teen and watched "Cosmos" by Carl Sagan. I cannot go to the university, but I am following your channel and study on my own during the weekends. I started list-wise but I have watched half of your videos. I will catch up sooner than later. I was particularly shocked with your videos on the holographic universe and the causality. I follow Don Lincoln and several Spanish channels, but yours are the most mindblowing videos to my naive mind. Thank you so much for revealing these misteries to common people <3

[evannoyes]

As someone who grew up watching Nova and being obsessed with the space/physics episodes, finding this channel was a breath of fresh air. I cant say exactly how many years I've been watching, but this is definitely one of my favorite youtube channels

[JohnComeOnMan]

In this unfortunate era of conspiracies and misinformation, this channel is priceless.

[tobeymalone]

I first started watching in high school, I remember sending these videos to my physics teacher and asking him about the science you were talking about. I'm finishing college now and I still try to watch as many of these as I can. Here's to the next decade!

[didiersavard]

Retired aircraft avionic technician here. Been watching PBS Nova and other science show since the late 80's. So going to Space time was just part of the voyage. Thank you so much.

[SylviaMc]

I’ve been watching since October 2016 when at 51 I took an astronomy class at college and fell in love with astrophysics. I’ve watched most of the episodes and while I don’t understand all of the material, I’ve learned a lot and appreciate all of the hard work you do. Thank you for educating me. Here’s to another 10 years and more!

[pleaseplayagainvods]

I only found SpaceTime a year or two ago, and randomly watched a few episodes, but then decided to SortByDate and watch them all from the start in order to make sure I didn't miss any. It was the right choice! I've been caught-up for a few months and I think I'm going to start a 2nd pass through them. The way the episodes build on lessons from past episodes is extremely well done and makes for a great and enjoyable journey!

[ZeitGeist_TV]

I've been watching since 2015 when I was homeless at the time, got my own place in 2019 and I'm grateful to still be here. 🙏🏾 Thank you for all the content over these years and cheers to many many many more years of this.

[boodramrav]

I can’t believe it’s already been 10 years. I’ve been watching since day 1!

Congratulations Professor O’Dowd and the entire PBS Space Time team!!

[kentonagbone]

I've only been watching for a few months, and am slowly making my way through the back catalogue. I started watching as the Youtube algorithm started recommending the channel, as I've been an avid view of your sister channel PBS Eons for a couple years now.