Many, if not most, experts are now admitting that clovis was not the first culture in the Americas. There is concrete proof of earlier cultures in NA that has been discovered within the last 10 years. The earliest date is now about 15,000+ years ago. Clovis is about 11,500 years old. There are artifacts buried deeper than clovis in at least one site in Texas. We also now know that there were several distinct migrations into the Americas and not all of the people came from the same areas or even looked like eachother.