In this episode, I sit down with Janna Levin, a theoretical astrophysicist at Barnard College of Columbia University, Guggenheim fellow, and author of Black Hole Survival Guide, Black Hole Blues, A Madman Dreams of Turing Machines, and How the Universe Got Its Spots. Janna started out as a philosophy major drawn to the biggest questions, then found in physics a way of answering them that felt true for everyone, everywhere. Preparing for this conversation blew my mind more than almost any other, and sitting with her only deepened that. What We Dive Into: 1. When a massive star collapses into a black hole, the star itself keeps falling and leaves behind only curved, empty space. With no material features left to observe, every black hole looks alike, which is why physicists treat them like giant fundamental particles holding clues to quantum gravity. 2. Einstein realized the purest experience of gravity is weightlessness, the feeling of falling freely with no chair, floor, or bed in the way. What we call heaviness is really something resisting our fall, while objects simply follow the natural curves of spacetime. 3. Janna suggests technological species may face a bottleneck where the ingenuity that builds rockets also builds bombs. Surviving it could mean reaching a balance with nature so complete that a civilization becomes hard to detect, which may help explain why the cosmos looks so quiet. Know Thyself, but not by yourself. A guided space to return home to yourself. https://www.knowthyselfcollective.com ✨THANK YOU TO OUR SPONSORS: https://www.mudwtr.com/knowthyself Use code KNOWTHYSELF for up to 43% off sitewide https://www.oneskin.co/KNOWTHYSELF Use code KNOWTHYSELF for 15% off OneSkin Larineco: 50% off on remineralizing gum https://www.buylarine.com/knowthyself ___________ ___________ ✨MORE FROM JANNA LEVIN ↳Substack: https://jannalevin.substack.com ↳Instagram: https://www.instagram.com/jannalevin/?hl=en ↳The Moth Story: https://youtu.be/dVubvLgTcxg?si=Hkaic0osIYwBMcA0 ↳https://jannalevin.com 📜MORE FROM KNOW THYSELF ↳Spotify: https://spoti.fi/4bZMq9l ↳Apple: https://apple.co/4iATICX ↳Instagram: https://www.instagram.com/knowthyself/ ↳TikTok: https://www.tiktok.com/@andreduqum ↳Facebook: https://www.facebook.com/knowthyselfbyandreduqum/ ↳https://knowthyselfpodcast.com/ 👁️MORE FROM ANDRÉ ↳Instagram: https://www.instagram.com/@andreduqum ↳Linkedin: https://www.linkedin.com/company/know-thyself-podcast ↳Book recs: https://www.knowthyselfpodcast.com/book-list