Question

If a 10-mile-wide comet hits the earth, how will this likely affect the history of life?

Answer 1

Answer:

Earth would still be intact, but a massive extinction event of life would occur. But, life would likely bounce back.

. 

Explanation:

There have been a few mass extinction events in the geological past and at least one (end Cretaceous) was likely due to a 10 km asteroid or comet striking Earth. This caused the end of the dinosaurs (except birds there living ancestors), but it did mean that mammals and our ancestors, did survive and took over the world