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During the last ice age around 20,000 to 30,000 years ago, the first people crossed into North America over a land bridge where the Bering Strait is located today, following animal herds and living as hunters and gatherers. By 10,000 BCE these early peoples had reached the continental United States and relied on hunting elk, deer and bison as well as gathering plants for food. Beginning 5,000-3,000 BCE, some groups began domesticating crops like corn, squash and beans and transitioned to farming in addition to their hunter-gatherer practices.












