An ancient-DNA revolution is turning the high-speed equipment used to study the DNA of living things on to specimens from the past. The technology is being used to create genetic maps of saber-toothed cats, cave bears, and thousands of ancient humans, including Vikings, Polynesian navigators, and numerous Neanderthals. The total number of ancient humans studied is more than 10,000 and rising fast. The old genes have already revealed remarkable stories of human migrations around the globe. But researchers are hoping ancient DNA will be more than a telescope on the past--they hope it will have concrete practical use in the present. Many artists worry about the encroachment of artificial intelligence on artistic creation.