Ancient Hyena Dung Contains Human Hair—and a Small Part of Our Fossil RecordPerfectly preserved, the specimen proves hominins inhabited a South African valley.
Tiny Spermbots Are Coming to Fertilize an Egg Near YouAt least one day. For now, they are just cute.
Soviet-Era Nuclear Warheads Have Been Providing 10 Percent of Our PowerA historic U.S.-Russian pact comes to an end this week.
Why Are Pilot Whales Dying in the Florida Keys?At least 22 are dead and 29 are still missing on the edge of Everglades National Park.