When did Humans arrive in the Western Hemisphere?

Humans are believed to have arrived in the Western Hemisphere around 15,000 to 20,000 years ago, likely crossing the Bering Land Bridge from Asia during the last Ice Age. Archaeological evidence suggests that these early peoples, known as Paleo-Indians, spread throughout North and South America over thousands of years. Sites such as Clovis in North America provide some of the earliest evidence of human presence in the region.