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TIL China currently operates 69% of all High Speed Rail in existence, stretching 4600km from the far west of the country (Kashgar Prefecture) to its eastern-most city (Fuyuan). The next-highest is Spain, with only 6%.

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BrgMx TIL that most if not all of captive rhesus monkeys carry the herpes B virus, making them especially unsuitable as pets.
rRoXe TIL Windsocks are calibrated to visually show wind speed as well as wind direction. They are designed such that each inflated red/white stripe indicates a 3 knot increase in wind speed to a maximum of 15 knots.
Egg40 TIL that all ships of the Royal Australian Navy are marked with a large red kangaroo. This tradition came about after Australian warships were frequently confused with British vessels
kOZad TIL, Ant traps don’t literally trap and kill ants. Workers carry small portions of the bait back to the nest where it is transferred mouth to mouth to other workers, larvae, and queens to kill the entire colony.
MxKA TIL that the students of the University of Colorado at Boulder named their cafeteria grill after Alferd G. Packer–a convicted cannibal. Their slogan: “Have a friend for lunch!”