4 ms·
Earth has been struck by large comets many times killing the majority of life on the planet each time. In an early solar system it would be more frequent. Onc
by tastyfreeze 1y ago
Earth has been struck by large comets many times killing the majority of life on the planet each time. In an early solar system it would be more frequent. Once a comet impacts there is one less comet out there. The solar system cleans up over time making impacts less likely over time.
- kulahan 1y agoThere isn’t that much of a difference in the number of comets in space across just 5 billion years.
- mkl 1y agoThere's not much difference between now and 3.5-3.8 billion years ago, but before that there were a lot more: https://en.wikipedia.org/wiki/Late_Heavy_Bombardment https://en.wikipedia.org/wiki/Late_Heavy_Bombardment