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TIL The clearest lake in the world is Blue Lake (Rotomairewhenua) in New Zealand. Located in Nelson Lakes National Park

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RWnw TIL that a man survived exposure to near-vacuum pressure for 10 seconds during a space suit test; he felt the saliva on his tongue boil right before losing consciousness.
OG5x1 TIL flat escalators are called travelators
oRroY TIL a man named Juhayman al-Otaibi claimed to be the Mahdi (a messianic figure in Islamic eschatolog) and formed a cult following that besieged and took over al-Haram, the holiest Islamic site, in the city of Mecca for more than two weeks, and had left 255 pilgrims killed and hundreds injured
kXgg TIL In 2009, a new black spot about the size of the Pacific Ocean appeared in Jupiter’s southern hemisphere.
QNrge TIL there is still one actor from the 1939 movie The Wizard of Oz alive, Caren Marsh Doll, who was Judy Garland's stand-in, and it is in fact her feet seen in the film when Dorothy taps the heels of the slippers together. Caren is 105 years old.