The first people to inhabit America were the Paleo-Indians, who arrived in North America around 15,000 years ago from Siberia, across the Bering Land Bridge. They were nomadic hunter-gatherers who followed herds of animals, such as mammoths and mastodons, for sustenance. The Paleo-Indians used stone tools and weapons to hunt and survive in their environment, and they developed distinct cultures and traditions based on their geographic locations and resources. Over time, the Paleo-Indians spread throughout North and South America, becoming the ancestors of the various indigenous peoples who inhabited the continent before European colonization.