Sediment cores taken from lakes on Sanak Island in the western Gulf of Alaska show that glaciers from the last Ice Age may have retreated 1,500 to 2,000 years earlier than previously thought. Massive ice sheets would have prevented travel from Asia into North America and South America, but the earlier dates coincide with coastal migration […]

An analysis of fat residue on pottery shards from North Africa suggests that people may have been eating yogurt 7,000 years ago. The fermented milk product may have made dairy products more digestible at a time when not many adults possessed the genetic adaptation necessary to digest the lactose found in unprocessed milk. The pottery […]