Where did early humans migrate from before arriving in North America?

The

first people into the Americas were nomadic hunters. They didn't

plan to come here, they followed the migrations of the game. Like

most people, they were interested in getting enough to eat and

leaving things a bit better for their children. We don't consider

them "Native Americans" as they weren't born here and they predate

the development of today's Native Americans(Indians). Rather we

call them "PaleoIndians."

They walked across dry land from Asia. The great ice age lowered

the water of the Bering strait and created a new land, Beringia.

Beringia is generally thought to have been a flat plain, dry and

dusty. It did support plant and animal life.