Who were the first people in Americas and how did they get there?

The first people in the Americas are believed to be the Paleo-Indians, who migrated from Siberia to North America via a land bridge known as Beringia that existed during the last Ice Age, around 20,000 to 15,000 years ago. This migration likely occurred as they followed herds of large game animals. Over time, these groups spread throughout North and South America, adapting to diverse environments and giving rise to various indigenous cultures.