14 archeological sites in the US that changed what we know about the earliest Americans

Structures at Mesa Verde National Park.MarclSchauer/ShutterstockArchaeological sites older than the Roman Empire and the pyramids can be found in many US states.These sites shed light on the first humans who arrived in North America.Some are closed to the public, but tourists can visit several of them to glimpse the distant past.The US is less than 250 years old, but some of its most important archaeological sites are older than the Viking seafarers, the Roman Empire, and the pyramids.Many help