Children tend to deliver a steady stream of surprises, some pleasant and some not-so-pleasant, after they emerge from the womb. Then again, perhaps just as often, children start delivering surprises before their big premiere. Take this baby in Arkansas, for instance. The mother was several weeks into gestation on one child when she got an unexpected and extremely uncommon surprise: she was pregnant again.

A new special by National Geographic set out to trace the origins of the human race using 350,000 DNA swabs, a joint project between National Geographic and IBM called the Genographic Project. The result is ‘The Human Family Tree’, which illustrates how at least 75 percent of humans came from a single man or woman in Africa tens of thousands of years ago.