SVANTE PAABO, the DNA palaeontologist whose work provided the inspiration for “Jurassic Park”, has produced a nice Christmas present for students of human evolution. He and his colleagues have confirmed, using the creature’s whole genome, that a fossil finger bone which is at least 30,000 years old, and which was found in a cave in the Altai mountains of Siberia, comes from a previously unknown human species. That was all but certain from their previous study of the creature’s mitochondrial DNA (an abundant form of the molecule found in cells’ powerpacks), released in March. The latest analysis, published in Nature on December 23rd, removes any doubt—and adds a tooth to the meagre stock of evidence from the new species that modern science is able to examine.