They have it backwards,,my ancestors ran off our undesirables across the ice bridge into russia. Seriously,,not all of us native americans are the same people,,that is easy to see if you are at a place where a lot of diffrent tribes are gathered together.There is a lot of evidence that some came up from south america and some i believe from stories passed down were created right here in the united states. I dont understand why that seems to trouble so many people.