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TIL The bubonic plague lives in the stomach of it's host, the flea. When it attempts to feed, this causes it to regurgitate infected blood back in to the wound, spreading the bacteria

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R7v94 TIL of the "Lost Battalion," 211 Texas Guardsmen that were surrounded in the Vosges Mts. in 1944. They were saved by the Japanese-American 442nd Regiment, which suffered over 800 casualties while effecting the rescue. Veterans of the 442nd were later made "honorary Texans" in 1962.
78W9p TIL that the Sahara Desert ( known for being the world’s hottest desert) used to be a tropical rainforest about 6,000 years ago.
AD1aB TIL Karl Marx was known for his extravagant and wasteful spending
QBnL TIL a group got instructions to sleep as long as they wanted, their cortisol started to rise at 8, and woke up at 9. Another group was said they’d wake up at 6, and their CRH and cortisol rose at 5. Just their expectations of waking time changed the behaviour of stress hormones.
1aPl7 TIL that bullet proof vests made of a material called Zylon, and purchased by various federalstate and local agencies, were found to have a failure rate of 58%.