Radiocarbon dating of a prehistoric archeological site in Florida suggests that 14,550 years ago, hunter-gatherers, possibly accompanied by dogs, butchered or scavenged a mastodon next to a small pond. The findings, based on a four-year study of the Page-Ladson archaeological site in the Aucilla River, about 45 minutes from Tallahassee, Florida, provide a rare glimpse of the earliest human occupation in the southeastern United States, and offer clues to the timing of the disappearance of large animals like the mastodon and camel that roamed the American Southeast during the Late Pleistocene. Additionally, the artifacts at Page-Ladson highlight that much of...