Florida, it seems, has always been a popular destination. Even the first known Americans gravitated to the state.

Of course, they probably went for the mastodons.

Underwater archaeologists and other researchers have taken a second look at a sinkhole 30 feet deep in the Aucilla River in northern Florida that is rich with remnants of stone tools, as well as fossilized mastodon bones and dung.

Although scientists had studied the location, known as the Page-Ladson site, for more than a decade and knew how old some of the material was, they could not come up with definitive evidence that humans and mastodons were there at the same time.