“4. People talk about the asteroid that killed the dinosaurs, like it just happened one day. All the dinosaurs were hanging out, all together in an open field, and the asteroid slammed down and destroyed them, killed them all and all at once. Not so, of course. Some died on the day, no doubt about it, and probably a lot – but the whole business took years. Generations, maybe. They can’t say for sure. They know that a ten-kilometer.”
