History of North America encompasses the past developments of people populating the continent of North America. While it was widely believed that continent first became a human habitat when people migrated across the Bering Sea 40,000 to 17,000 years ago, recent discoveries may have pushed those estimates back at least another 90,000 years. People settled throughout the continent, from the Inuit of the far north to the Mayans and Aztecs of the south. These complex communities each developed their own unique ways of life and cultures.