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 education.nationalgeographic.org Submitted by [deleted] t3_z6p9uy 2 years ago in todayilearned 143 comments 2,115
konami9407 t1_iy4490k wrote 2 years ago Reply to comment by nickyurick 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] Futurama Permalink Parent 7
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