Janna Levin: Black Holes, Wormholes, Aliens, Paradoxes & Extra Dimensions | Lex Fridman Podcast #468
Lex Fridman · 180:50
Janna Levin, a cosmologist specializing in black holes, walks Lex Fridman through what black holes actually are—regions of spacetime defined by a one-way event horizon, not dense leftover stars—and why their formation...