Skip to content

Science

Everything filed under science — astronomy, chemistry, earth sciences, and 6 more.

3,893
shows
9
subcategories
9
new this week

Most subscribed

in science · refreshed hourly

Newest episodes

last seven days
  • PBS Space Time

    The Black Hole Entropy Enigma

    Viewers like you help make PBS (Thank you 😃) . Support your local PBS Member Station here: https://to.pbs.org/DonateSPACE Thanks to CuriosityStream for supporting PBS Digital Studios. You can learn more at https://www.curiositystream.com/spacetime and use the code "spacetime" during the sign-up process. You can further support us on Patreon at https://www.patreon.com/pbsspacetime Get your own Space Time t­-shirt at http://bit.ly/1QlzoBi Tweet at us! @pbsspacetime Facebook: facebook.com/pbsspacetime Email us! pbsspacetime [at] gmail [dot] com Comment on Reddit: http://www.reddit.com/r/pbsspacetime Help translate our videos! https://www.youtube.com/timedtext_cs_... Previous Episode: Is There Life on Mars? https://www.youtube.com/watch?v=VmEY6T5Wc-Q Hosted by Matt O'Dowd Written by Matt O'Dowd Graphics by Luke Maroldi Assistant Editing and Sound Design by Mike Petrow Made by Kornhaber Brown (www.kornhaberbrown.com) Black Holes should have no entropy, but they in fact hold most of the entropy in the universe. Let’s figure this out. If black holes exist – which, apparently, they do – they contradict other theories in physics as sacred as general relativity. They cause all sorts of problems with quantum theory, which we’ve talked about and will review in a sec. But they also present an apparent conflict with the notion of entropy and the second law of thermodynamics. It was while pondering that conflict that Jacob Bekenstein realized an incredible connection between black holes and thermodynamics. His insight launched an entire new way of thinking about the universe in terms of information theory, and ultimately led to the holographic principle. Which I promise we’re getting to and we’re almost there. We just need to understand string theory first and to understand that, you’re going need to know about why Black Holes contain most of the universe’s entropy. Special thanks to our Patreon Big Bang, Quasar and Hypernova Supporters: Big Bang Anton Lifshits CoolAsCats David Nicklas Fabrice Eap Quasar Dean Fuqua Mark Rosenthal Mayank M. Mehrota Roman Pinchuk Tambe Barsbay Vinnie Falco Hypernova Brent Mullins Chuck Zegar Donal Botkin Edmund Fokschaner John Hofmann Jordan Young Joseph Salomone Matthew O’Connor Ratfeast Thanks to our Patreon Gamma Ray Burst Supporters: Alexander Rodriguez Alexey Eromenko Benoit Pagé-Guitard Brandon Cook Brandon Labonte Daniel Lyons David Crane Deborah Whittaker Fabian Olesen Greg Allen Greg Weiss James Flowers James Hughes JJ Bagnell Jon Folks Kevin Warne Malte Ubl Mark Vasile Nicholas Rose Nick Virtue Scott Gossett Shannan Catalano سلطان الخليفي Learn more about your ad choices. Visit megaphone.fm/adchoices

    Today · 16 min
  • PBS Space Time

    Quantum Physics in a Mirror Universe

    To learn to think like a scientist check out http://Brilliant.org/SpaceTime PBS Member Stations rely on viewers like you. To support your local station, go to: http://to.pbs.org/DonateSPACE Check out the new Space Time Merch Store! https://pbsspacetime.com/ When you look in mirror, and see what you think is a perfect reflection. You might be looking at universe whose laws are fundamentally different. You can further support us on Patreon at https://www.patreon.com/pbsspacetime Tweet at us! @pbsspacetime Facebook: facebook.com/pbsspacetime Email us! pbsspacetime [at] gmail [dot] com Comment on Reddit: http://www.reddit.com/r/pbsspacetime Help translate our videos! https://www.youtube.com/timedtext_cs_... Previous Episode: Did Life on Earth Come from Space? https://www.youtube.com/watch?v=REl20rlZGTw Hosted by Matt O'Dowd Written by Graeme Gossel & Matt O'Dowd Graphics by Luke Maroldi Assistant Editing and Sound Design by Mike Petrow Made by Kornhaber Brown (www.kornhaberbrown.com) When we think about symmetry, the first thing that comes to mind is mirror symmetry. Butterflies, Rorschach tests, and classically attractive faces all look the same when flipped left-to-right. In physics, a symmetry is when the laws of physics are unchanged due to some transformation of coordinates. We’ve seen examples where it is - the universe is symmetric to coordinate shifts in space, time, and even the rather abstract phase of the wave function. So it might be surprising to learn that with all the weird ways in which the universe IS symmetric, it’s NOT entirely symmetric under this most intuitive one. The laws of physics work differently in the universe of the mirror. Special thanks to our Patreon Big Bang, Quasar and Hypernova Supporters: Big Bang David Nicklas CoolAsCats Anton Lifshits Fabrice Eap Justin Lloyd Juan Benet Quasar Tambe Barsbay Mark Rosenthal Dean Fuqua James Flowers Vinnie Falco Hypernova Chuck Zegar Jordan Young Joseph Salomone John Hofmann Matthew O’Connor Edmund Fokschaner Donal Botkin Danton Spivey Mark Heising Thanks to our Patreon Gamma Ray Burst Supporters: Alexey Eromenko Brandon Cook Brandon Labonte Carlo Mogavero Daniel Lyons David Crane Dustan Jones Greg Weiss Jack Frosch James Hughes James Quintero JJ Bagnell John Webber Jinal Doshi Jon Folks Joseph Emison Josh Thomas Kenneth F Leonard Kevin Warne Malte Ubl Mark Vasile Nathan Hitchings Nicholas Rose Nick Virtue Ratfeast Richard Broman Scott Gossett Shawn Azman Tim Stephani Tommy Mogensen سلطان الخليفي Learn more about your ad choices. Visit megaphone.fm/adchoices

    Today · 22 min
  • Za trnkovým keřem

    Co nosíme do lesa ?

    Co si bereme do lesa a bez čeho se klidně obejdeme? 🐗🌲V dalším díle podcastu Za trnkovým keřem s Jirkou rozebíráme výbavu a výstroj do lesa. Sdílíme vlastní zkušenosti, co se nám osvědčilo, co od vybavení očekáváme a jak nad jeho výběrem přemýšlíme.Každému sedí něco jiného, a tak nás zajímá i váš pohled. Bez jakého kousku výbavy do lesa nevyrážíte? A co jste naopak pořídili a dnes vám to jen leží ve skříni? Napište nám do komentářů. 👇🤝 MOJI PARTNEŘI🌙 www.czsk.pard.com👕 Swedteam na www.elovec.cz🎯 www.proarms.cz🔭 www.meopta.com🍔 Grilguru.cz / slevový kód "kanec5"Spotify https://open.spotify.com/show/2YwYilJuPzC5FQqtDuh2No?si=437edfead73a4a67Apple Podcast https://podcasts.apple.com/us/podcast/za-trnkov%C3%BDm-ke%C5%99em/id1866404582Instagram https://www.instagram.com/kanec_v_zite/Facebook https://www.facebook.com/profile.php?id=61561638187435#hunting #Myslivost #Outdoor #LoveckeVybaveni #kynologie #geartest #podcast

    Today · 1 hr 14 min
  • PBS Space Time

    Are Cosmic Strings Cracks in the Universe?

    Take the Space Time Fan Survey Here: https://forms.gle/wS4bj9o3rvyhfKzUA 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 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. 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 Hosted by Matt O'Dowd Written by Jason Segall & 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 Mark Evans David Taiclet Ben Dimock Daniel Alexiuc Nenado763 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 Kinsey Alex Kern Ethan Cohen Stephen Wilcox Christina Oegren Mark Heising Hank S Hypernova Supporters william bryan Sergio Bonfiglio drollere Joe Moreira Marc Armstrong Scott Gorlick Paul Stehr-Green Adam Walters Russell Pope Ben Delo Scott Gray Антон Кочков John R. Slavik Mathew Donal Botkin John Pollock Edmund Fokschaner Joseph Salomone chuck zegar Jordan Young m0nk Daniel Muzquiz Gamma Ray Burst Tony Affinito Lillith Montgomery Avi Yashchin MHL SHS Kory Kirk Joshua Friede Terje Vold Anatoliy Nagornyy Sam Kirkpatrick comboy Brett Baker Jeremy Soller Jonathan Conerly Andre Stechert Ross Bohner Paul Wood Kent Durham jim bartosh Nubble Chris Navrides Scott R Calkins 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 James Ramsey Justin Jermyn Mr T Andrew Mann Isaac Suttell Devon Rosenthal Oliver Flanagan Bleys Goodson Robert Walter Bruce B Simon Oliphant Mirik Gogri Mark Delagasse Mark Daniel Cohen Brandon Lattin Nickolas Andrew Freeman Shane Calimlim Tybie Fitzhugh Robert Ilardi Eric Kiebler Craig Stonaha Martin Skans The Art of Sin Graydon Goss Frederic Simon Tonyface John Robinson A G David Neal Kevin Lee justahat John Funai Cass Costello Tristan Bradley Jenkins Kyle Hofer Daniel Stříbrný Luaan AlecZero Vlad Shipulin Cody Malte Ubl King Zeckendorff Nick Virtue Scott Gossett Dan Warren Patrick Sutton Daniel Lyons DFaulk Kevin Warne Learn more about your ad choices. Visit megaphone.fm/adchoices

    Today · 20 min

All Science3,895