As I stated, humans are not originally from the Americas, instead, humans were from Asia and Africa. They were there because it had warm climate, and the Americas did not. The places where humans originated had easy access to clean water.
It is proven that humans are from Asia and Africa because the oldest human skull ever found was in Africa. Therefore, humans were from Africa, and moved up into Asia over time. Humans did not have as much of a rough time in Africa and Asia as they would in other places because of good resources.
Humans came to the Americas during the ice age. Before