Despite a long ban, poachers in Africa continue to kill thousands of elephants each year for the money they can make from the tusks. But now, says Michael Novacek of the American Museum of Natural History, scientists are using a sophisticated dating method to fight back.

Africans are more genetically diverse than the inhabitants of the rest of the world combined, according to a recent study. Michael Novacek of the American Museum of Natural History discusses the implications of the findings.