11. The ocean is the world's best museum
Shipwrecks. Ancient cities. Lost planes. Beneath the ocean surface, there are countless artifacts of human civilization, many thousands of years old, many as of yet undiscovered. Museums display what we've recovered from a certain chunk of history. The ocean is a museum of all human history, including the parts we don't even know about yet.
12. It's also the world's biggest human cemetery
The space program has certainly had its fair share of disasters, but in terms of taking human life, the cosmos have been shockingly kind to us over the course of our existence. The ocean, on the other hand, has claimed more lives than we'll be able to count, from lost individuals to—if artifacts are any indication—entire cities. Obviously, we should watch out for extraterrestrial threats like asteroids, but we shouldn't forget that, throughout our history, it's been the ocean that truly wanted to murder us.