More than 70 percent of Earth is covered by ocean, and yet the marine environment remains one of the most mysterious ones on Earth. Maybe that's not surprising, given that we've explored only about 5 percent of the ocean to date.
So what do we know about the vast ocean that surrounds us? Quite a lot, as it turns out. Just check out the 50 fascinating facts on the mind-boggling infographic below, which was created by the online scuba diving magazine Dive In.
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