Ancient DNA- is a method that has only recently been applied to the study of human fossils, but researchers think it has the potential to shed new light on the past 2 million years of human evolution, by allowing them to pinpoint the proteins that made up the flesh and blood of our ancestors. The technology's effects would be similar to those of the recently created technology of ancient DNA analysis, which has helped reveal shocking secrets about humanity's past over the past 20 years. Many modern humans have been found to have Neanderthal genes, indicating that the two species must have interbred at some point over the past 100,000 years.