The latest known fossils belonging to extinct human species dated to between 117,000 and 108,000 ago.
When the species disappeared is unclear, however. In the 1930s, archaeologists uncovered a bone site just above the Solo River at Ngandong, Central Java. It contained 12 skull caps and two lower leg bones belonging toAt the time there were few methods available to accurately date the site, and the fossils were estimated to be anything between 550,000 to 27,000 years old.
"The original excavation occurred before even radiocarbon and uranium series dating were developed," paleoanthropologist Russell Ciochon, from the University of Iowa, toldCiochon is one of the researchers who have returned to Ngandong to reassess the site and theremains found there. Using a series of dating techniques, the team was able to determine the fossils were between 117,000 and 108,000 years old.
"At present we don't know what this event could have been but the carcasses and bones that were lying on the landscape were incorporated into floodwaters and deposited downstream at the site of Ngandong where the river narrows slightly," study author Kira Westaway, from Macquarie University, Australia, told"It's likely that the fossils got caught in a log jam to form a sort of 'carcass jam' and then were buried in the river sediments.
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