Not to be a downer, but the universe could end any minute. Or it could take a hundred million years… give or take. So we don’t know *when* it will happen, but we can be a bit more certain about *how* the universe will end. In this episode, Tai unpacks the science of the end times. He meets astrophysicist Katie Mack, author of The End of Everything (Astrophysically Speaking), to talk about theories like the Big Crunch, the Big Rip, or the Heat Death of the universe. Tai also chats with Chris Kochanek, a scientist who studies massive world-ending explosions out in the cosmos, and learns about how the universe is a violent, cutthroat place.