Ever wondered how much of our vast, mysterious oceans we’ve uncovered? Spoiler alert: not nearly as much as you’d think!
Someone else added: "Such a simple thing to give me nightmares." "Well I wasn't scared of water before now I'm terrified thanks," a fourth person commented. Sign up to our free indy100 weekly ...
Ocean depth is divided into zones: littoral, bathyal, abyssal and hadal. The deepest part of the ocean, the hadal zone, is anywhere deeper than six kilometres. What is the average depth of the ocean?