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TIL Xi'an, the ancient city in the Northwest China that used to be the capital for many medieval Chinese dynasties (also appears in the Chinese classic "Romance of the Three Kingdoms"), has now a Muslim quarter and a sizable Muslim population. 3 percent of Chinese population are Muslims.

GnbN TIL Carl Sagan was an avid marijuana user his entire life. “I am convinced that there are genuine and valid levels of perception available with cannabis (and probably with other drugs) which are, through the defects of our society and our educational system, unavailable to us without such drugs”
5Y50r TIL Medieval scholar Al-Biruni,after accurately measuring earth’s radius and judging by the size of Asia and Africa,predicted the existence of a landmass in the ocean between Asia And Europe,similar in size to the known continents and with similar geological features,likely inhabited by humans
5YE78 TIL at the 2015 Rugby World Cup finals, a boy went on to the pitch to celebrate with the winners but was tackled by a steward. One of the New Zealand players intervened, returned the boy to his mother and then gave the boy his gold World Cup medal
vPj0x TIL Simply calmly treading the water in a rip tide can return you to shore in 3 minutes, because rip currents are really whirlpools, according to an oceanography professor's study that sensors to analyze the flow of wave water. (Source: nps.edu, 2010)
4XO6w TIL since 2015 the Saudi Crown Prince has purchased a $450 million Leonardo da Vinci painting, a $300 million mansion and a $500 million yacht.