Ocean Facts
The ocean produces over 50% of Earth's oxygen
The ocean absorbs 25% of human-produced CO2
Only 5% of the ocean has been explored
The ocean contains 97% of Earth's water
More than 80% of ocean is unmapped and unexplored
The average depth of the ocean is 12,100 feet
The deepest point is 36,000 feet - Challenger Deep
There are more historic artifacts in the ocean than all museums combined
The ocean regulates Earth's climate
One cubic foot of seawater contains 2.2 pounds of salt
Sound travels 4.5 times faster underwater
The longest mountain range on Earth is underwater - the Mid-Ocean Ridge
An estimated 91% of ocean species remain undiscovered
The Great Barrier Reef is visible from space
The ocean absorbs most of the extra heat from climate change
Ocean Regions
Pacific Ocean
64 million square miles, 46% of all ocean water, Mariana Trench
Atlantic Ocean
41 million square miles, youngest ocean, Mid-Atlantic Ridge
Indian Ocean
27 million square miles, warmest ocean, monsoon patterns
Southern Ocean
8 million square miles, circumpolar current, penguin habitat
Arctic Ocean
5 million square miles, smallest and shallowest, polar ice
Mediterranean Sea
965,000 square miles, cradle of civilization, nearly enclosed
Coral Triangle
2.3 million square miles, 76% of all coral species
Sargasso Sea
2 million square miles, the only sea with no shores
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