When hundreds of eerily perfect circles were discovered on the bottom of the Mediterranean Sea, theories abounded about what they could mean. Four years of underwater research revealed a lost world.

This is only the second time the species has been recorded while alive. “I thought it was A.I.,” says fish biologist Kory Evans.

This story appears in the October 2019 issue of National Geographic magazine. To see all that’s hopeful and appalling about the way we treat sea turtles, there’s no better place to start than ...

Thousands of marine species from microscopic zooplankton to the largest cetaceans rely on sound for survival and many have evolved unique oral and aural adaptations. Understanding them better could ...

A deep-sea creature only recorded alive on one other occasion has been seen for what's believed to be the first time in broad ...

National Geographic also has a policy of including explanatory notes for place names in dispute, citing as an example a body of water between Japan and the Korean peninsula, referred to as the Sea of ...

Sala, 56, is not simply a marine adventurer; his mission, through the National Geographic project conservation organisation ...