Humans and Mastodons Coexisted in Florida, New Evidence Shows

Humans and Mastodons Coexisted in Florida, New Evidence Shows - The New York Times: "Now, the researchers say, the discovery of an unmistakable human artifact, a stone knife fragment, embedded in sand and dung that allowed for exact dating, proves that paleoindians, as archaeologists call the first people to come to North America, colonized northern Florida by 14,550 years ago."