For a long time now Clovis Points provided the earliest definitive evidence of a human presence in the Americas, which set their arrival at about 12k years ago. However this date has been hotly debated by paleo-antropologists over the past several decades, with some arguing that the arrival of humans was up to tens of thousands of years earlier. This past week, scholars arguing for an earlier human presence won a small victory when reports of a new find in Texas pushed the date a few millennia back to 15k years ago. Just one more example of how dynamic the study of pre-history is.
