I.The First Americans (13,000-2500 B.C.)A.Peopling New Worlds1.2 main theories of the arrival of people on the americasa)Siberian hunters crossed the expanse of land linking Asia withNorth America during the last Ice Age (10,500 B.C.)- discoveredhunter’s paradise of megafauna (large animals)b)First humans arrived on boat following the before continuous coastto Alaska and progressed southward --- throughout travel groupssettled nearby or traveled inland to establish new homes.2.Most archaeologists and scientists believe it was a mix of both these routes3.Native Americans descended from early immigrants, some came laterfrom northeastern Asiaa)Athapaskan speakers settled in Alaska and NW Canada (7000B.C.) -- some later migrated SW to for Apaches and Navajos4.Paleo-Indians (earliest Americans) - traveled in large groups 15-50 people,men hunted, women cared for children and food.5.(9000 B.C.) - many species of megafauna like mammoths became extinctB.Archaic Societies1.(8000 B.C.) Americans began to modify their way of life from the PaleoIndiansa)Climate increased, sea levels risen, forests grew, started theimmense range of flora and fauna that we are familiar today2.Demographic roles changed - Men took fishing and hunting, womencollected wild plant products.