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TIL: There is a figure known as the "unluckiest man in Pompeii". In 2018, archaeologists uncovered his skeleton and a rock where his head should've been, he got struck by the rock and his skull was found in a tunnel a distance away.

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via reddit.com

9wY7B TIL about Han Purple, a synthetic pigment used in ancient China, incl on the Terracotta Army. Use stopped in ~220 AD and it was rediscovered in 1990s. It was found that in very low temperatures and high pressure, it "loses" a dimension, acts as a 2D material, and is useful in quantum computing.
D1Jgj TIL Sub-replacement fertility that is a fertility rate which, if sustained, leads to each new generation being less populous than the older is around 2.33 as opposed to the intuitive guess of 2 children per woman.
wdj7 TIL That dolphins and whales are best buds and play mates. A dolphin will get on top of the whale’s head, then the whale tilts upwards so the dolphin can slide down into the water.
M0a0 TIL Rick James had alprazolam, diazepam, bupropion, citalopram, hydrocodone, digoxin, chlorpheniramine, methamphetamine and cocaine in his blood at the time of his autopsy.
gdKb TIL the welsh word for microwave is popty ping