developed the technology for sequencing ancient DNA degraded and contaminated with modern DNA. They have succeeded in sequencing accurately the genomes of our Neanderthal cousins who lived in Europe about fifty thousand years ago. They also sequenced genomes of our own species who lived in Europe around the same time, and genomes of a third species, called Denisovans because they were found in Denisova cave in Siberia. He published the story of the sequencing and the surprising results in his book, Neanderthal Man: In Search of Lost Genomes, in 2014.