The ocean’s depths are a hostile world of crushing pressure, freezing temperatures, and total darkness. Yet divers risk everything to push deeper than ever before. From nitrogen narcosis to the bends, ...

Chilean devil rays swim in the Atlantic Ocean near the Azores. Reinhard Dirscherl / ullstein bild via Getty Images There’s only one word for it: indescribable. “It’s one of those awesome experiences ...

Fitted with electronic tags incorporating a suite of sensors, tracking devices and occasionally tiny cameras, they gather information where human researchers can’t. They have revealed remarkable ...