The petite Dorset people went extinct before the Vikings arrived and never mixed with Inuit or Eskimo peoples.
Ancient stone artifacts recently excavated from Saudi Arabia possess similarities to items of about the same age in Africa.
The ancestors of Native Americans may have lived on and around the Bering Strait for about 10,000 years before streaming into the Americas.
Follow in herpes' path, and you'll be walking on the the very route early humans took as they made their way around the globe. Trace shows us how this much-hated virus can reveal so much about our past.