Paladin327 t1_iy3odg4 wrote
Reply to comment by OakParkCemetary in TIL More than 80 percent of the ocean has never been mapped, explored, or even seen by humans and as a result, we know more about the surface of Mars than Earth by [deleted]
Well, there was the actual sealab programs which provided major advancesments in saturation diving for deep sea divers, so there was that
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