What If The Cosmological Constant Wasn't Truly Constant?

The Final Obstacle to (Nearly) Infinite Energy

Thanks to Radiacode for sponsoring this video. Use the promo code "PBS" to get an exclusive 10% discount at: https://103.radiacode.com/PBS They say fusion is 50 years away, no matter when you ask. Then why are billions suddenly being pumped into fusion startups? Yes to train LLMs, but there's a reason the technobrats are bullish on fusion in particular. The fact is, the technological challenges have been chipped away and in many cases solved over the past decades, and there's really no one deal-breaker difficulty remaining. One of the final challenges is deciding on the physical vessel to contain our mini artificial stars--and we have some pretty sci-fi options that are nearly ready to go. PBS Member Stations rely on viewers like you. To support your local station, go to:http://to.pbs.org/DonateSPACE Sign Up on Patreon to get access to the Space Time Discord! https://www.patreon.com/pbsspacetime Check out the Space Time Merch Store https://www.pbsspacetime.com/shop Sign up for the mailing list to get episode notifications and hear special announcements! https://mailchi.mp/1a6eb8f2717d/spacetime Search the Entire Space Time Library Here: https://search.pbsspacetime.com/ Hosted by Matt O'Dowd Written by Matt Caplan, Jake Mitstifer, & 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. End Credits Music by J.R.S. Schattenberg: https://www.youtube.com/user/MultiDroideka 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 Learn more about your ad choices. Visit megaphone.fm/adchoices [https://megaphone.fm/adchoices]

Heisenberg Made a Discovery in 1925. We Still Can't Fully Account for It

For 72 hours, enjoy 15% OFF on all Hoverpens with code PBS, or click on the link https://noviumdesign.shop/PBS - Free shipping to most countries. Also on Amazon: https://noviumdesign.shop/crQH4A 2025 is … was the international year of quantum science and technology. Yes because quantum tech is increasingly important, but especially because quantum mechanics was invented 100 years ago this year. In 1925, our strangest true theory went from being a peculiar set of ideas to describe some funny results from experiments, to a full-blown theoretical framework that overturned how we think reality really works. So today, as the centenary year approaches its end I want to take you on a little journey through what may be the most paradigm-destroying several months in scientific history. PBS Member Stations rely on viewers like you. To support your local station, go to:http://to.pbs.org/DonateSPACE Sign Up on Patreon to get access to the Space Time Discord! https://www.patreon.com/pbsspacetime Check out the Space Time Merch Store https://www.pbsspacetime.com/shop Sign up for the mailing list to get episode notifications and hear special announcements! https://mailchi.mp/1a6eb8f2717d/spacetime Search the Entire Space Time Library Here: https://search.pbsspacetime.com/ Hosted by Matt O'Dowd Written by Bahar Gholipour & Matt O'Dowd Post Production by Leonardo Scholzer 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. © 2025 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 Alexander Tamas David Paryente Juan Benet Kenneth See Mark Rosenthal Morgan Hough Peter Barrett Santiago Tj Steyn Vinnie Falco Supernova Ethan Cohen Glenn Sugden Grace Biaelcki Mark Heising Stephen Wilcox Tristan Lucian Claudius Aurelius Tyacke Hypernova Alex Kern Ben Delo Cal Stephens chuck zegar David Giltinan Dean Galvin Donal Botkin Gregory Forfa Jesse Cid Dyer John R. Slavik Justin Lloyd Kenneth See Massimiliano Pala Michael Tidwell Mike Purvis Paul Stehr-Green Scott Gorlick Scott Gray Spencer Jones Stephen Saslow Thomas Mouton Zachary Haberman Антон Кочков Daniel Muzquiz Gamma Ray Burst Aaron Pinto Adrien Molyneux Almog Cohen Anthony Leon Arko Provo Mukherjee Ayden Miller Ben McIntosh Bradley Jenkins Bradley Ulis Brandon Lattin Brian Cook Bryan White Chris Liao Christopher Wade Chuck Lukaszewski Collin Dutrow Craig Falls Craig Stonaha Dan Warren Daniel Donahue Daniel Jennings Daron Woods Darrell Stewart David Johnston Doyle Vann Eric Kiebler Eric Raschke Eric Schrenker Faraz Khan Frederic Simon Harsh Khandhadia Ian Williams Isaac Suttell James Trimmier Jeb Campbell Jeremy Soller Jerry Thomas jim bartosh John Anderson John De Witt John Funai John H. Austin, Jr. John591 Joseph Salomone Junaid Ali Kacper Cieśla Kane Holbrook Keith Pasko Kent Durham Koen Wilde Kyle Atkinson Marcelo Garcia Marion Lang Mark Daniel Cohen Mark Delagasse Matt Kaprocki Matthew Johnson Michael Barton Michael Clark Michael Lev Michael Purcell Nathaniel Bennett Nick Hoffenstoffer III Nicolas Katsantonis Paul Wood Rad Antonov Reuben Brewer Richard Steenbergen Robert DeChellis Ross Story Russell Moore SamSword Sandhya Devi Satwik Pani Sean Owen Shane Calimlim SilentGnome Sound Reason Steffen Bendel Steven Giallourakis Terje Vold Thomas Dougherty Tomaz Lovsin Tybie Fitzhugh Vlad Shipulin William Flinn WILLIAM HAY III Zac Sweers Learn more about your ad choices. Visit megaphone.fm/adchoices [https://megaphone.fm/adchoices]

How Are Quasiparticles Separate From Particles?

For more information on membership go to https://www.magellantv.com and use code PBS PBS Member Stations rely on viewers like you. To support your local station, go to:http://to.pbs.org/DonateSPACE Sign Up on Patreon to get access to the Space Time Discord! https://www.patreon.com/pbsspacetime The device you’re watching this video on is best understood by thinking about positive and negative charges moving around a circuit of diodes and transistors. But the only elementary particle actually flowing in the circuit is the negatively charged electron. And yet those flowing positive charges are there, in the form of a particle you may never have heard of. Check out the Space Time Merch Store https://www.pbsspacetime.com/shop Sign up for the mailing list to get episode notifications and hear special announcements! https://mailchi.mp/1a6eb8f2717d/spacetime Search the Entire Space Time Library Here: https://search.pbsspacetime.com/ Hosted by Matt O'Dowd Written by Fernando Franco Félix & Matt O'Dowd Post Production by Leonardo Scholzer, Yago Ballarini, Pedro Osinski, Caique Oliveira, 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. © 2022 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 Devin Wiley Ryan Salsamendi Steffen Bendel Gautam Shine Bryce Fort Peter Barrett David Neumann Leo Koguan Alexander Tamas Morgan Hough Amy Hickman Juan Benet Vinnie Falco Fabrice Eap Mark Rosenthal David Nicklas Quasar Supporters Glenn Sugden Vikram Vaka Alex Kern Ethan Cohen Stephen Wilcox Christina Oegren Mike Conroy Mark Heising Hank S Hypernova Supporters Ankur Anand Ryan Moser David Giltinan Ivari Tölp Vyce Ailour Brandon Paddock Ken S Gregory Forfa Kirk Honour drollere Joe Moreira Bradley Voorhees Marc Armstrong Scott Gorlick Paul Stehr-Green Ben Delo Scott Gray Антон Кочков John R. Slavik Mathew David S. Cerutti Donal Botkin John Pollock Edmund Fokschaner Joseph Salomone chuck zegar Jordan Young John Hofmann Matthew Pabst Daniel Muzquiz Gamma Ray Burst Supporters Justin Lloyd Chuck Lukaszewski Edward Hodapp Kevin Tillery Cole Marc Forand D. Delair Walter Montalvo Andrea Galvagni Larka Jerry Thomas Nikhil Sharma Alexander Gruber Jonathan Cordovano John Anderson Scott Hannum Paul Widden Bradley Ulis Craig Falls Vivaan Vaka Kane Holbrook Ross Story teng guo Sujasha Gupta Vaka Mason Dillon Harsh Khandhadia Thomas Tarler bsgbryan Sean McCaul Susan Albee Frank Walker Matt Q MHL SHS Terje Vold James Trimmier Anatoliy Nagornyy comboy Andre Stechert Paul Wood Kent Durham jim bartosh Nubble Ramon Nogueira The Mad Mechanic Ellis Hall John H. Austin, Jr. Diana S Faraz Khan Almog Cohen Alex Edwards Ádám Kettinger MD3 Endre Pech Daniel Jennings Cameron Sampson Geoffrey Clarion Russ Creech Jeremy Reed Eric Webster David Johnston Web Browser Michael Barton Mr T Andrew Mann Isaac Suttell Devon Rosenthal Oliver Flanagan Bleys Goodson Robert Walter Mirik Gogri Mark Delagasse Mark Daniel Cohen Nickolas Andrew Freeman Shane Calimlim Tybie Fitzhugh Robert Ilardi Eric Kiebler Craig Stonaha Graydon Goss Frederic Simon Tonyface John Robinson Jim Hudson A G David Neal justahat John Funai Tristan Bradley Jenkins Daniel Stříbrný Luaan Cody Thomas Dougherty King Zeckendorff Dan Warren Patrick Sutton John Griffith Daniel Lyons DFaulk Learn more about your ad choices. Visit megaphone.fm/adchoices [https://megaphone.fm/adchoices]

Do We Need an UPDATED Dark Matter Model?

PBS Member Stations rely on viewers like you. To support your local station, go to: http://to.pbs.org/DonateSPACE Sign Up on Patreon to get access to the Space Time Discord! https://www.patreon.com/pbsspacetime 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. Check out the Space Time Merch Store https://www.pbsspacetime.com/shop Sign up for the mailing list to get episode notifications and hear special announcements! https://mailchi.mp/1a6eb8f2717d/spacetime 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 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 your ad choices. Visit megaphone.fm/adchoices [https://megaphone.fm/adchoices]

The Science of the James Webb Telescope Explained!

Learn More About Henson Shaving: https://hensonshaving.com/PBS PBS Member Stations rely on viewers like you. To support your local station, go to:http://to.pbs.org/DonateSPACE Sign Up on Patreon to get access to the Space Time Discord! https://www.patreon.com/pbsspacetime You’ve probably heard about the James Webb Space Telescope and seen some cool pictures. But why should astronomers have all the fun? How do we get to use this new toy ourselves? JWST Links: Galactic Hunter JWST image processing guide: https://www.youtube.com/watch?v=hkdf-LhldPU MAST space telescope archive: https://archive.stsci.edu/ STScI Data Analysis Toolbox: https://www.stsci.edu/jwst/science-execution/data-analysis-toolbox Anton Petrov: https://youtu.be/w7-2F5ixznM & https://youtu.be/TYxf3W2M7c4 How To Process JWST Images: https://youtu.be/DVuonz26P0w If you're a Space Time fan and you use the JWST (whether it's using the data, colorizing photos or using it in some other interesting way) send us an email @ pbsspacetime@gmail.com with the Subject Line "Using the JWST" and we'll try to find a way to shout you out! Check out the Space Time Merch Store https://www.pbsspacetime.com/shop Sign up for the mailing list to get episode notifications and hear special announcements! https://mailchi.mp/1a6eb8f2717d/spacetime Search the Entire Space Time Library Here: https://search.pbsspacetime.com/ Hosted by Matt O'Dowd Written by Matt O'Dowd Post Production by Leonardo Scholzer, Yago Ballarini, Pedro Osinski, Caique Oliveira, Adriano Leal & Stephanie Faria GFX Visualizations: Ajay Manuel 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. © 2022 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 Scott Gilgallon Ryan Salsamendi Steffen Bendel Gautam Shine NullBlox.ZachryWilsn Adam Hillier Bryce Fort Peter Barrett David Neumann Charlie Leo Koguan Alexander Tamas Morgan Hough Amy Hickman Juan Benet Vinnie Falco Fabrice Eap Mark Rosenthal David Nicklas Quasar Vivaan Vaka Glenn hEADcRASH Sugden Sujasha Gupta Vaka, PhD. Vikram Vaka, M.D. Alex Kern Ethan Cohen Stephen Wilcox Christina Oegren Mike Conroy Mark Heising Hank S Hypernova Ryan Moser Ivari Tölp Vyce Ailour Brandon Paddock Oneamazinguy Ken S Gregory Forfa Kirk Honour Mark Evans drollere Joe Moreira Marc Armstrong Scott Gorlick Paul Stehr-Green Russell Pope Ben Delo Scott Gray Антон Кочков John R. Slavik Mathew Donal Botkin John Pollock Edmund Fokschaner Joseph Salomone chuck zegar Jordan Young John Hofmann Daniel Muzquiz Gamma Ray Burst Alexander Gruber Jonathan Cordovano John Anderson Scott Hannum Paul Widden Bradley Ulis Craig Falls Kane Holbrook John Yaraee Ross Story teng guo Mason Dillon Harsh Khandhadia Thomas Tarler Sean McCaul Carsten Quinlan Susan Albee Frank Walker Matt Q WhizBangery MHL SHS Terje Vold James Trimmier Anatoliy Nagornyy comboy Andre Stechert Paul Wood Kent Durham jim bartosh Nubble The Mad Mechanic Ellis Hall John H. Austin, Jr. Diana S Ben Campbell Faraz Khan Almog Cohen Alex Edwards Ádám Kettinger MD3 Endre Pech Daniel Jennings Cameron Sampson Geoffrey Clarion Russ Creech Jeremy Reed Eric Webster David Johnston Web Browser Michael Barton Mr T Andrew Mann Isaac Suttell Devon Rosenthal Oliver Flanagan Bleys Goodson Robert Walter Bruce B Mirik Gogri Mark Delagasse Mark Daniel Cohen Nickolas Andrew Freeman Shane Calimlim Tybie Fitzhugh Robert Ilardi Eric Kiebler Craig Stonaha Graydon Goss Frederic Learn more about your ad choices. Visit megaphone.fm/adchoices [https://megaphone.fm/adchoices]