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TIL That the DEA found an increase from about 4% THC in 1995 to about 12% in 2014 in marijuana. By 2017, another study showed, the potency of illicit drug samples had gone up to 17.1% THC, an increase of more than 300% from 1995 to about 2017.

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xVnMB TIL in 2018, NYC had a period where (for the first time ever) it had a lower murder rate than London, causing many people to believe London became more dangerous. In truth, it was likely heavy snow that caused the lower rate in NYC. By the end of the year, NYC had double the murder rate.
VoyD TIL The Japanese are descendants of ancient Koreans
L4dp TIL that there are more slaves today than at any other point in history.
YpkkZ TIL that India once arrested a pigeon on suspicion of spying for Pakistan and held it under armed guard.
nROG TIL that Harlan Ellison wrote the Hugo Award winning short story “I Have No Mouth, and I Must Scream” in a single night. He made no changes to the first draft.