Filmed at DemystiCon 2025 in Portugal, Dr. C.S. Unnikrishnan, from India's Tata Institute, reveals a very different take on the nature of light. Beyond the noise of headlines and textbooks, the speed of light's measurement isn't proving to be so simple. Drawing on years at the heart of experiments that listen for the universe’s faintest signals, he questions whether the speed of light is truly constant. Here, gravity and clocks intertwine, and relativity itself stands on uncertain ground. PATREON https://www.patreon.com/c/demystifysci PARADIGM DRIFT https://demystifysci.com/paradigm-drift-show OUR HOMEBREWED MUSIC Check out our band's new album: https://secretaryofnature.bandcamp.com/album/everything-is-so-good-here Vinyl pre-orders available now: https://buy.stripe.com/14A5kC3Od5d21Ms7zPdEs09 00:00 Go! Overview of Cosmic Gravity and Relativity 00:04:40 Gravitational Influence on Dynamics 00:10:50 Historical Perspective on Light and Relativity 00:16:23 Experiments and Light Hypothesis Inconsistencies 00:21:27 Proposed Experiment for One-Way Light Speed Measurement 00:26:19 Experimental Evidence Against Einstein's Hypothesis 00:29:02 Time Dilation in Relativity 00:31:35 GPS and Relativity 00:33:29 Existence of Absolute Frame 00:35:30 Gravitational Effects on Inertia 00:41:03 Paradigm Shift in Physics 00:44:00 Q&A #cosmology, #astrophysics, #bigbang, #einstein, #relativity, #gravity, #speedoflight, #cosmic, #spacetime, #paradigmshift, #experimentalphysics , #light, #research #philosophypodcast , #sciencepodcast, #longformpodcast ABOUS US: Anastasia completed her PhD studying bioelectricity at Columbia University. When not talking to brilliant people or making movies, she spends her time painting, reading, and guiding backcountry excursions. Shilo also did his PhD at Columbia studying the elastic properties of molecular water. When he's not in the film studio, he's exploring sound in music. They are both freelance professors at various universities. PATREON: get episodes early + join our weekly Patron Chat https://bit.ly/3lcAasB MERCH: Rock some DemystifySci gear : https://demystifysci.myspreadshop.com/all AMAZON: Do your shopping through this link: https://amzn.to/3YyoT98 DONATE: https://bit.ly/3wkPqaD SUBSTACK: https://substack.com/@UCqV4_7i9h1_V7hY48eZZSLw@demystifysci BLOG: http://DemystifySci.com/blog RSS: https://anchor.fm/s/2be66934/podcast/rss MAILING LIST: https://bit.ly/3v3kz2S SOCIAL: - Discord: https://discord.gg/MJzKT8CQub - Facebook: https://www.facebook.com/groups/DemystifySci - Instagram: https://www.instagram.com/DemystifySci/ - Twitter: https://twitter.com/DemystifySci MUSIC: -Shilo Delay: https://g.co/kgs/oty671