When hundreds of eerily perfect circles were discovered on the bottom of the Mediterranean Sea, theories abounded about what ...

This story appears in the March 2015 issue of National Geographic magazine ... Moreover, in the ocean, only those life-forms at the bottom of the food chain must make luciferins.

Oceanxplorers, a new documentary series from National Geographic, invites us to dive ... James Cameron, known for his passion for deep-sea exploration, described the series in a press release ...