Humans may have been on Mastodon much earlier than we thought. http://www.npr.org/sections/thetwo-way/2017/04/26/525628056/new-evidence-suggests-humans-arrived-in-the-americas-far-earlier-than-thought "It looks like the work of humans."
Humans may have been on Mastodon much earlier than we thought. http://www.npr.org/sections/thetwo-way/2017/04/26/525628056/new-evidence-suggests-humans-arrived-in-the-americas-far-earlier-than-thought "It looks like the work of humans."