Infographic describing depth of the ocean
The Mariana Trench / La fosa de las Marianas
But the biggest unknown is how to go about studying the ocean, when most of it doesn’t really want to be found. 16 Things No One Knows About The Ocean
It's unbelievably mind-blowing to realize the sea is much deeper than even the loftiest part of land above sea level.
The depth of the Mariana Trench, deepest known point in the ocean - it's deeper into the earth than a commercial aircraft cruises above the earth. <<< This is somehow terrifying