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TIL that in a zoo, tigers and lions are fed ice cubes made by freezing the blood known as "bloodsicles." This is done to provide cooling to them in a hot weather.

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vPPJK TIL Although “Blade Runner” has become one of the most critically acclaimed science fiction films in history, it was originally a box-office dud. it is an adaptation of Philip K. Dick's 1968 novel Do Androids Dream of Electric Sheep?
R5m48 TIL that Celtic languages were once widely spoken across much of western and central Europe. These languages/cultures slowly succumbed to Roman and Germanic expansion, and today Celtic languages are reduced to Ireland, the UK, and Northwest France.
PwLn TIL Wolfgang Amadeus Mozart sold more CDs in 2016 than any other artist
R5xNl TIL about the North American X-15, a hypersonic rocket-powered aircraft which holds the world record for highest speed ever recorded by a crewed, powered aircraft. The X-15 reached that speed on 3 October 1967, when test pilot William J. Knight flew at Mach 6.7 (4,520 mph; 7,274 km/h).
EdEw TIL there was chinese herbalist who, some believed, lived to be 256 years old