The Earliest Americans!!!!!!

Hello, North America was a home to a lot of people.  And still is.  When Christopher Columbus landed in America, he thought he had reached a group of islands between Asia and Australia.  those islands were known as the East Indians.  Columbus therefore called the first North Americans "Indians."  Today, we refer to these people and their descendants as Native Americans or American Indians.  I wonder how Native Americans' ancestors came to this land?  I don't know? Got to go bye