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TIL in Wisconsin, researchers found that the presence of wolves reduced vehicle collisions with deer by about a quarter, creating an economic benefit that was 63 times greater than the cost of wolves killing livestock.

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aOGo TIL the three mile limit for international waters was created as this was the maximum distance a cannon ball could travel from the shore.
mxl1Y TIL that a Japanese chemical company once polluted a bay so thoroughly that some sediment contained up to 2 kg of mercury per ton. This concentration made mining economically viable, and eventually the company set up a subsidiary to do just that.
BgaYx TIL in 2008 the US Border Patrol spent $8.4 Million to sponsor a Nascar driver to boost agency recruitment.
DWag TIL Victorian London had many reports of “Spring-heeled Jack” - a monster with claws & a cape who could spit fire & jump >9 ft in the air - accosting & frightening women into seizures & catatonic states. A group of soldiers encountered him & opened fire; he slapped one in the face & jumped away
wOmJ TIL that “Bruce”, the shark created for the movie Jaws, almost killed George Lucas. On a visit to the effects shop Lucas stuck his head into the shark’s mouth and, as a joke, Spielberg closed it on his head, trapping him. The mouth was jammed shut and had to be pried open in order to free Lucas.