Why do people sleep at night?

They sleep to get rest and when they’re tired. If they do not sleep enough they will not be active in the morning

Explanation:

Hope that helps :D

explanation:

the fossil record extends back to a dog-like ancestor some 55 million years ago, which gave rise to the first horse-like species 55 to 42 million years ago in the genus eohippus.

and after water is usually warmed by the sun the water temperature raises and then evaporates .