[neffy]

Some background on this, there is a long standing back to the late 20th century - and to those of us outside the field darkly funny - controversy within this particular scientific community on when the first humans arrived, which can be broadly googled by searches for "Clovis man controversy".

Sure archeologists are very smart people, and like all other very smart people, can still be caught on the wrong side of history as new evidence piles up against existing theories.