Genetic research shows her branch contributed to gene pool of today's Melanesians, who live on a broad arc of Pacific islands. X Woman is helping researchers grasp ancient migration patterns.
A new study concludes that humans mated with Neanderthals 50,000 to 80,000 years ago, leaving traces of the Neanderthal genome in some modern humans.
Scientists have found evidence of what might be a 'new creature' that is neither Neanderthal nor human. X Woman could revise theories about human ancestors and when they left Africa.
Column: Advances in DNA research enhance basic concepts of evolution.