This image provided by researchers shows artifacts made of bony material from a giant sloth discovered at a rock shelter in Brazil, recovered from archaeological layers dated to 25,000 to 27,000 years ago. Research published Wednesday, July 12, 2023, in Britain's Proceedings of the Royal Society B journal, suggests humans lived in South America at the same time as now-extinct giant sloths, bolstering evidence that people arrived in the Americas earlier than once thought. (Thais Rabito Pansani via AP)Thais Rabito Pansani/AP