Scientists analyzing 1,300-year-old human feces from the Cave of the Dead Children in Mexico have discovered that people often dealt with nasty intestinal infections more than a millennium ago. “Wor… [+3562 chars]Read More
Mystery population of human ancestors gave us 20 of our genes and may have boosted…
A novel genetic model suggests that the ancestors of modern humans came from two distinct populations that split and reconnected during our evolutionary history.
