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TIL that even though Tigers and Lions look to be the same size, Tigers weigh up to 300lbs/136kgs more than Lions due to their muscle density. One incident of a Tiger getting into a Lion enclosure resulted in the Tiger severing the Lion’s jugular in one swipe.

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GApQN TIL In Qatar, a special license is required for people to be able to purchase pork or alcohol products. Pork and alcohol products are also subject to a 100% "sin tax".
gMeD7 TIL Los Angeles School district officials approved a porn video shoot on one of its campuses in October 2011. The shoot was uncovered in an NBC investigation on filming-related school disruptions, which nets the district $2 million annually. Three students were even invited to the film premiere.
4W6o TIL Dolphins can overcome sleep deprivation and remain constantly vigilant for days at a time by resting one half of their brain while the other half remains conscious.
4pWR TIL: As to not betray the Hippocratic oath, doctors (also nurses, etc.) are prohibited from administering lethal injections used for capital punishment. The task is left to under trained and unqualified orderlies and technicians, resulting in slip-ups which may lead to extreme pain to the inmate.
N7ZJ1 TIL The Phoenix Zoo and the Fauna and Flora Preservation Society of London (now Fauna and Flora International), with financial help from the World Wildlife Fund, are credited with saving the Arabian oryx from extinction.Starting with 9 animals and now estimated more than 8,000 Arabian oryx's.