Satellites orbit Earth at 17,000 miles an hour, capturing images of our world that are breathtaking, but some are bizarre. This unique perspective reveals objects that seem to make no…

A search for an underground escape route said to have been used by Al Capone. Also: who or what built earthen mounds in Washington state.

Thirty years after the worst nuclear catastrophe in history, which sent a plume of highly radioactive fallout into the atmosphere, biologist Rob Nelson and anthropologist Mary-Ann Ochota are the first…