Analysis of the entire genome of a 7,000 year old hunter-gatherer has revealed interesting facts about the evolution of human genes. DNA extracted from the teeth of remains found in a cave in Spain were completely sequenced. This marks the first pre-agricultural genome to be sequenced and analyzed. While previous sequence data have shown changes in genes associated with early agriculture, such as adaptations to lactose, grain, livestock diseases, the new data raises interesting questions about when some of these genes evolved.
