Don’t you just love ancient history. I love when archeologists come across things thousands of years old right under our noses. We were not the only one’s to have lived in particular areas and discovering anything is always exciting.
Native Americans generally have a deep oral history stretching back centuries which they pass on to responsible people in their community to keep track of historical matters. Without them a lot of history would have been lost. Just the same as ancient Celtic history has disappeared and many other cultures. Often done deliberately by those that took over from these people.