In this unedited, on-site conversation with cosmologist Dr. Brian Keating, we examine what counts as evidence in modern physics by pressing on one of cosmology’s most trusted observations: the cosmic microwave background. The discussion centers on a core tension between measurement and interpretation: specifically whether a near-perfect black body spectrum can reasonably be attributed to an early-universe plasma. As assumptions about the Big Bang, black body radiation, and material physics are questioned, the exchange becomes increasingly uncomfortable, revealing how deeply theoretical commitments shape scientific judgment. What emerges is not a verdict, but a rare, unfiltered look at how evidence, authority, and first principles collide in contemporary physics. PATREON https://www.patreon.com/c/demystifysci PARADOX LOST PRE-SALE: https://buy.stripe.com/7sY7sKdoN5d29eUdYddEs0b HOMEBREW MUSIC - Check out our new album! Hard Copies (Vinyl): FREE SHIPPING https://demystifysci-shop.fourthwall.com/products/vinyl-lp-secretary-of-nature-everything-is-so-good-here Streaming: https://secretaryofnature.bandcamp.com/album/everything-is-so-good-here #physics, #cosmology, #astrophysics, #quantummechanics , #bigbang, #cosmicmicrowavebackground, #philosophyofscience, #physicsfun , #theoreticalphysics, #spacetime , #fundamentalphysics , #longformpodcast, #physicspodcast, #philosophypodcast MERCH: Rock some DemystifySci gear : https://demystifysci-shop.fourthwall.com/ AMAZON: Do your shopping through this link: https://amzn.to/3YyoT98 DONATE: https://bit.ly/3wkPqaD SUBSTACK: https://substack.com/@UCqV4_7i9h1_V7hY48eZZSLw@demystifysci 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