Humans came to Americas over land bridge connecting Asia to Alaska during last Ice Age.
Over time nomadic hunting groups dispersed across the continent.
The tribes found permanent settlements and formed distinct cultural and social practices.
Chinook Haida fished and built Totem Poles.
Chumash and Pomo with population 100 and produced acorns.
Anasazi built cave dwelling and learned to farm.
Where did Anasazi live?
Who built Totem poles?
When and where did Leif Ericson sail?
In 1000 A.D. Leif Ericson sailed across Atlantic Ocean.