Underwater Cave (image) Penn State Caption Cave diver Alexandro Alvarez inspects the newly-discovered skull of Naia, the 12,000-13,000 year-old human skeleton discovered in a submerged cave on the Yucatan peninsula of Mexico. An international team of researchers detailed their analysis of what is the oldest most complete, genetically intact human skeleton in the New World in a paper published today in the journal Science. Credit Photo by Daniel Riordan Araujo Usage Restrictions non commercial use only Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.