Humans are not from the Americas . I bet you're wondering all these questions about where did they start and how. But first I will tell you why. Humans actually migrated 20,000 years ago additionally. They were in Africa during Pangea and then the world seperated,and they were separated from the Americas.
First of all, you already know they were in africa, but they were on the east side of the next to the indian sea. They also lived in tribes in somalia ,and cairo egypt. Eventually the migrated to Asia India , Iraq ,and China bordering the indian sea.
Finally, the best most fascinating peace how they came. First of all, The ice age happened and glaciers got bigger in the arctic and antarctic circles so that formed