The Aleutian and Pribilof Islands region of southwestern Alaska is dominated by volcanic peaks, rugged coastlines, powerful oceans, and severe weather. Despite the harsh conditions, the earliest known habitation of the Aleutian Islands began over 10,000 years ago. The first people were descendants of migrants from Siberia into Alaska, who crossed the Bering Land Bridge, an Ice Age land connection between the two hemispheres which existed until approximately 12,000 years ago. The Native people of the greater Aleutian Islands refer to themselves as Unangax in their own language, Unangam tunuu. The more widely known name, Aleut, was attributed by colonizers in the mid-1700s.