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Physics

Every show filed under physics, ranked by what listeners actually play.

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E o Resto é... Ciência
Quente e Frio. Ainda não se sabe quando e quanto vai chover. Primeiro chega o frio e o nevoeiro e depois várias frentes
O estado do tempo muda a partir deste fim de semana. A culpa é de uma depressão da qual vão nascer várias frentes. Que chuva carregam para Portugal é que não é ainda possível prever See omnystudio.com/listener for privacy information.
Today · 6 min
The Origins Podcast with Lawrence Krauss
What's New in Science with Sabine and Lawrence | AI Dreams and Nightmares, Dark Matter Discovered? and Fake Science News.
There has been a lot of doom and gloom combined with excitement, if that is possible, about AI in the science news lately. Sabine and I tried to deconstruct the hype associated with the highly touted Open AI solution of one of the Millennium Problems in Mathematics, as well as explore the real concerns and imaginary concerns associated with both the recent Open AI agent hacking of Huggy Face, and the blog post by the CEO of Anthopic arguing for a pause in AI development because of the potential for disaster—a statement endorsed by both Elon Musk and Sam Altman. As usual, things are neither as bad, nor as good as they might seem. We also tackled two other stories of interest. A single data point might signal the discovery of particle dark matter in an underground detector! Sabine and I come at this from different perspectives—she has always been suspicious of the claimed need for dark matter, and I have not only explored and proposed a number of the prime candidates, but I also helped propose and promote the kind of technologies that led to LZ/LUX, the collaboration making the current announcement. Nevertheless both Sabine and I agree that it is premature to celebrate. And while Sabine won’t bet, I am betting that this single point will not be substantiated when more data comes in. Stay tuned. Finally we discuss a sad development—Scientific Paper Mills. Apparently you can buy your way to a first authorship, or just an authorship, on a scientific paper that can eventually be published somewhere, even if the results might not be completely kosher. While this is a disturbing new possibility, it seems like it is just affecting science at the margins. We need to try and stamp it out, but it is not undermining the bulk of scientific research. In any case, as they used to say on a famous TV show, after all the AI world-ending hype, happy to say: See you next time.. if there is a next time! As always, an ad-free video version of this podcast is also available to paid Critical Mass subscribers. Your subscriptions support the non-profit Origins Project Foundation, which produces the podcast. The audio version is available free on the Critical Mass site and on all podcast sites, and the video version will also be available on the Origins Project YouTube. Get full access to Critical Mass at lawrencekrauss.substack.com/subscribe
Today · 1 hr 5 min
Sleepy Facts About the Universe
What Are You Actually Watching During the Perseid Meteor Shower? - The Hidden Mechanics of Shooting Stars | Sleepy Facts About the Universe
When you watch a shooting star streak across a clear August night, you are not actually watching a star fall. You are witnessing a high-speed collision between the Earth and ancient debris from comet 109P Swift-Tuttle. This episode explores the true mechanics of the Perseid meteor shower, explaining how tiny grains of sand and pebble-sized particles enter our atmosphere at staggering speeds, compress the air in front of them, and heat up until they become glowing columns of plasma. The discussion traces the journey of these particles from the cold outer regions of our early solar system to their fiery end in our atmosphere. It also examines the role of Earth's thin atmospheric shield, the history of human understanding regarding meteorites, and how this constant rain of cosmic material may have delivered the organic building blocks of life to our planet. I wanted to understand what happens in the fraction of a second when a meteor flashes overhead. It is fascinating to realize that this beautiful, quiet event is actually a violent hypervelocity impact, and that the light we see is our own fragile atmosphere doing the vital work of protecting the planet. Understanding this process changes a simple summer sky show into a profound connection to the deep past and the physical reality of our solar system.
Today · 27 min
The Quark Side - Quantum Physics Podcast
Can Anything Really Travel Faster Than Light?
Why can’t anything with mass travel faster than light? Einstein’s relativity shows that the speed of light is more than a speed limit—it is a fundamental boundary imposed by space-time and causality. Even phenomena that appear to exceed it, such as...
Today · 50 min

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