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TIL that unlike any modern eyes, the lenses of trilobite eyes were actually constructed of calcite. This provided these ancient creatures with virtually unparalleled vision that was filled with streams of light and bursts of color, based on recent experiments conducted with calcite crystals.

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LEV9 TIL that 30% of people are iron-deficient. Successful treatment could raise national productivity 20%
gMKnL TIL that only 7 men have lived to see their millionth hour, though more than 100 women have done so
R7E94 TIL that the crime that led Sisyphus to push a boulder was cheating death. He made his wife not bury him properly before he died, chained death, and tricked Persephone into letting him briefly return to earth to scold his wife and ran away instead of returning to hell.
djx9 TIL Pancho Villa’s last words before he died were: “Don’t let it end like this. Tell them I said something.”
OoZW6 TIL Anthony Kiedis, lead singer of the Red Hot Chili Peppers, had a sexual relationship with a 14 year old and wrote the song "Catholic School Girls Rule" about it.