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 on November 28, 2022 at 6:42 AM in todayilearned 143 comments 2,115
abthomps t1_iy3p14j wrote on November 28, 2022 at 2:52 PM Remind me again what percentage of Mars has been explored by humans? Permalink 0 [deleted] OP t1_iy3qas3 wrote on November 28, 2022 at 3:01 PM [deleted] Permalink Parent 2
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