American Indians were the first people to live in North Dakota. We know a little about the earliest people because their stone tools, such as spear points, can be found where they left them. The tools they used tell us what era they lived in. An era• A time period that lasted thousands of years
• A change to another era happened when people changed the way they lived is a time period that lasted thousands of years.
Early People of North Dakota. (SHSND-ND Studies)