Genome of Denisovan cave girl sheds light on human ancestry

A replica of the tiny finger bone used to sequence the genome of a Denisovan girl placed on the hand of a modern-day human. Researchers extracted the genome using a technique that turns a single strand of DNA into a double strand, boosting the amount of sample material. The bone they used is between 74,000 and 82,000 years old. (Max Planck Institute for Evolutionary Anthropology/Science)