Final answer:
Early Americans got from Asia to America during the Ice Age by crossing a land mass that formed over the Bering Strait, between modern-day Alaska and Asia. This is known as the Bering Land Bridge migration model.
Step-by-step explanation:
Modern historians believe that early Americans got from Asia to America during the Ice Age by crossing a land mass that formed over the Bering Strait, between modern-day Alaska and Asia. This theory is known as the Bering Land Bridge migration model and is widely accepted among scientists and archaeologists.
During the last ice age, as sea levels dropped and glaciers formed, humans were able to migrate from Siberia to Alaska by walking across the land bridge. This migration took place in several distinct waves between about 10,000-14,000 years ago, with people following the megafauna of the time, such as mammoths and mastodons.