This is about your ancestors, after all (well ... 800,000 generations of your line—a long way down your family tree. Back then your primogenitor was more like a monkey than a chimp, no offense.

This tree shows that species A and B share a more recent common ancestor with each other than with either species C or species D. Likewise, species C and D share a more recent common ancestor with ...

These men have a common ancestor and the same last name, but only four of the individuals have been positively identified and placed on the tree. Your job is to complete the rest of the male ...