It’s not like this is a new discussion in archaeology.  Archaeologists have been debating this question for almost a century.  The evidence is strong that megafauna extinctions were caused by a mixture of climate change and human hunting, and that human hunters were here on the continent long before the famed Clovis culture arrived.  There are four verifiable pre-Clovis mammoth and mastodon sites in North America now: The Schaefer and Hebior sites in Wisconsin, the Manis site in Washington, and the Page-Ladson site in Colorado.  As well, there are several tantalizing sites that seem to date back more than 40,000 years.     

But who were the hunters who came before Clovis?  Ah…that’s a good question.

You might want to read:  www.pas.org/cgi/doi/10.1073/pnas.1420650112