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One of agriculture's most dangerous substances, anhydrous ammonia requires several precautions to handle.

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enmJ TIL the first webcam was deployed at Cambridge University computer lab – its sole purpose was to monitor a particular coffee maker and hence avoid wasted trips to an empty pot.
a8VKM TIL that the distinctive smells that new electronics and cars have are due to the substances that hold the dang thing together. These substances (adhesives, plasticizers, etc.) contain volatile organic compounds (VOCs). VOCs evaporate at or below room temperature and enters our nose as odor.
nelLr TIL in 1984, a group of cannabis growers in Northern California sued the federal government, alleging they had been subject to illegal surveillance by U2 spy planes.
GAJ44 TIL baseball player John Lindsey spent a record 16 years in the minor leagues before being promoted to the major leagues. He made just 12 appearances in Major League Baseball before breaking his hand. He was sent back down to the Minor Leagues at the start of the next season.
dDllE TIL that the first country to recognize U.S. independence from Great Britain, in 1777, was Morocco.