madsci.org

8a4aZ TIL that there were once volcanic eruptions on the moon, which created the dark areas of rock that we can see with the naked eye.
d8wp7 TIL That Psychologist George Stratton wore goggles that inverted his vision for 8 straight days. By day 4, his brain had begun correcting the inversion
ZNBB TIL that deep-sea fiber optic cables are now buried under the seabed, because the electricity running through them used to attract sharks who would bite into them - electrocuting the shark and destroying the cable