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TIL Action Comics #1 is so valuable that even a copy graded as low as 1.5/10 by the CGC still sold for $175,000.

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wLmlE TIL Khemjira Klongsanun, a runner in a Vietnam Marathon, found an abandoned puppy on the side of the road during the race, and ended up carrying it for the remaining 19 miles until the finish line. She adopted it afterwards.
wLnAE TIL that most work to restore paintings is designed to be removable, so that future conservation efforts can undo any changes
X0L0r TIL About 20% of people in Greenland attempt suicide at some point in their lifetime.
rRlVd TIL that plants don't die from cancer because plant cells can recreate any cell type the plant needs (unlike animal cells) so they replace dead cells & tissues easily. Also mutated plant cells are usually not able to spread to other parts of a plant due to rigid interconnecting cell walls
4X8Yg TIL that in physics, acceleration is the change in velocity(speed), jerk is the change in acceleration, jounce(snap) is the change in jerk, crackle is the change in jounce and pop is the change in crackle.