#428 – Sean Carroll: General Relativity, Quantum Mechanics, Black Holes & Aliens

1914.972 - 1938.273 Sean Carroll

We're a little unclear where they came from. I mean, maybe stellar black holes that got together and combined, but that's one of the Exciting things about new data from the James Webb Space Telescope is that quite large black holes seem to exist relatively early in the history of the universe. So it was already difficult to figure out where they came from. Now it's an even tougher puzzle.