Mastodon fossil may indicate earlier human presence in the Americas

A mammoth skeleton unearthed in Michigan appears to have been butchered by humans. The bones appear to date to 15,000 years before present. If this holds up, the date precedes the Clovis culture by several thousand years.

http://www.pbs.org/wgbh/nova/next/nature/mammoth-discovery-could-revise-earliest...

Oops! The topic title should say "Mammoth ", not "Mastadon".

>2 stellarexplorer: That's ok. I have trouble telling them apart myself.

>1 stellarexplorer: Amazing, thank you. I love the phrase "shadowy pre-Clovis human." :o)
I had no clue about the growth rings in the tusks, either.