Catastrophes in Science

One of the most popular theories about how we got the moon is that about four point five billion years ago, the early earth was by a mars size body. It's also commonly thought that the earth got its water oceans from repeated impacts by icy com s. In fact, the early history of the earth is thought to have been a par larly catastrophe prone period. But as the solar system finished forming, and things became more stable, allowing more uniform processes to take over. Still, catastrophes occur from time to time.