The giant Pacific octopus grows bigger and lives ... but have been known to attack and eat sharks as well as birds, using their sharp, beaklike mouths to puncture and tear flesh.

National Geographic's upcoming docuseries, 'Secrets of the Penguins,' captured a shocking encounter between a mother rockhopper penguin and giant, hungry sea lion, and PEOPLE has a first look at the f ...

This story appears in the January 2018 issue of National Geographic magazine. ‘If you take care of the birds, you take care of most of the big problems in the world.’ That’s what Thomas ...