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TIL Under particular conditions, some volcanic vents can produce large visible smoke rings

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e0MOE TIL that Kim Philby, head of the MI6 anti-communist section, was forced to resign over allegations that he helped two KGB moles escape. However, he was exonerated by the government. He then defected to the Soviet Union after having been KGB double agent for 30 years.
5VmlB TIL that globally, we produce over 9,900,000 tons of butter a year, and India produces 3,797,550 of that, making it the largest butter producer in the world (via Atlas Big). The United States, which comes in second place, makes less than half that amount each year, with Pakistan coming in third.
eBKJ TIL that weed and hops are from the same plant family
grj79 TIL that Mantis Shrimp have a second pair of thoracic appendages that are adapted for powerful close-range combat; their claws can accelerate at a rate comparable to that of a .22 caliber bullet when fired.
YpR1P TIL A man spent 12 years in a coma but was completely aware and awake the entire time.