If that age is accurate, the skeleton, Dubbed Eva de Naharon, or Eve of Naharon, —along with three others found in underwater caves along the Caribbean coast of the Yucatán Peninsula —would be the oldest human skeleton ever found in the Americas

The three other skeletons excavated in the caves have been given a date range of 11,000 to 14,000 years ago, based on radiocarbon dating. The finds could provide new clues to how the Americas were first populated.

The submarine was reported lost Aug. 16, 1942.  Underwater video footage captured by an expedition hired by sons of the commanding officer, Lt. Cmdr. Mannert L. Abele, allowed the Navy to confirm the discovery.

Japanese anti-submarine attack data recorded no attack in the Aleutian area at the time of the Grunion's disappearance, so the submarine's fate remained an unsolved mystery for more than 60 years, the US Navy said.