National Geographic says the world has a fifth ocean

National Geographic, one of the world's pre-eminent and most visible mapmaking groups, has officially decreed the existence of a fifth ocean. Called the Southern Ocean, it's the body of water that surrounds Antarctica.

(CNN) — Millions of children around the world have grown up memorizing basic facts about geography: there are seven continents and four oceans. Until now. National Geographic, one of the world's pre-eminent and most visible mapmaking groups, has officially decreed the existence of a fifth ocean. Called the Southern Ocean, it's the body of water that surrounds Antarctica.