USA HISTORY

Detailed explanation-1: -Before Homo sapiens evolved, our hominine ancestors foraged for millions of years. Foraging means relying on food provided by nature through the gathering of plants and small animals, birds, and insects; scavenging animals killed by other predators; and hunting.

Detailed explanation-2: -In the 1970s, college students in archaeology such as myself learned that the first human beings to arrive in North America had come over a land bridge from Asia and Siberia approximately 13, 000 to 13, 500 years ago. These people, the first North Americans, were known collectively as Clovis people.

Detailed explanation-3: -Scientists generally agree that the first Americans crossed over from Asia via the Bering land bridge, which connected the two continents. This exodus most likely began between 20, 000 and 40, 000 years ago.

Detailed explanation-4: -Drought, flood, and temperature changes could certainly push people to move on. Climate change also affects the food supply, and anthropologists have assumed that people came to the Americas because they were following food on the hoof.