Over and over new scientific discovers force us to develop new theories and timelines of human evolution. It has happened again. We reported here on Kasama the discovery of a whole new previously unknown human species, the Denisovians, using evidence drawn (believe it or not) from the DNA within a single pinky bone of a girl who died in Siberia 40,000 years ago.
However now, a stunning new discovery - Denisovian DNA has been uncovered in Spain, in a bone that is 400,000 years old (ten times earlier, and twice as old as the previously presumed age of "modern humans," Homo sapiens). The implications of this will take time to emerge. For now, here is the report from the New York Times.
Baffling 400,000-Year-Old Clue to Human Origins
By CARL ZIMMER
Scientists have found the oldest DNA evidence yet of humans’ biological history. But instead of neatly clarifying human evolution, the finding is adding new mysteries....