<human>:  When did the first humans arrive in the Americas?
<bot>: The first humans arrived in the Americas between 15,000 and 20,000 years ago. The earliest evidence of humans in the Americas comes from the Clovis culture, which is named after the site where it was first discovered in 1932. The Clovis culture was made up of people who were using stone tools that were shaped like spear points. The Clovis culture is thought to have been the first human culture to enter the Americas.