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TIL that cashews and mangoes are in the same botanical family as poison oak and poison ivy. Mango vines and uncooked cashews contain enough urushiol oil to cause similar rashes to ivy/oak exposure.

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NRLe TIL Marty Robbins, singer of Big Iron, raced in NASCAR. In the 1972 Talladega 500, his laps were 15mph faster than his qualifying time. After the race, he turned down the Rookie of the Race award and admitted that he removed the carb restrictor “to see what it was like to run up front for once.”
ZRxD TIL the word Saudade, a Portuguese word with no English translation, means the empty sadness and longing for that which may never return that accompanies nostalgia.
logpN TIL: Nuclear powered pacemakers were briefly produced and 9 people still have them inside. When they die the pacemakers and their Plutonium have to be returned to the Department of Energy.
ANPPx TIL Trains have tanks of sand with tubes that shoot sand under each wheel to create friction so the train accelerates more efficiently
Z8JAY TIL of the FBI's US highway serial killer initiative. According to reports, at any given time, there are numerous serial killers doubling as long haul drivers that are able to kill with little chance of being caught.