MEXICO CITY (AP) — More details have emerged about one of the oldest sets of human remains found in the Americas, a young woman nicknamed "Naia" whose nearly complete skeleton was discovered in 2007 in a water-filled cave in Mexico's Yucatan Peninsula.

A study has determined that as thought, the young woman was between 15 and 16 when she died by falling into the cave about 13,000 years ago.

Researchers add that she was about 5 feet (1.5 meters) tall and weighed about 110 pounds (50 kilograms) at her heaviest, though there was evidence she had suffered episodes of famine. She had broken her arm...