Well, this week, the National Geographic Society, which has produced maps for 106 years, recognized a fifth ocean in the world, the Southern Ocean.
Until now, the Southern Ocean was unofficially recognized by many scientists.
It officially joined the world's other four oceans -- the Atlantic, Pacific, Indian, and Arctic -- on "World Oceans Day" on Monday, according to National Geographic and The Weather Channel.
To watch a Weather Channel video about the world's fifth ocean, click here.
To read more about the National Geographic Society's official mapping of the Southern Ocean, click here.
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