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TIL that 85-90% of cancers are due to people's environment and lifestyles

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GAlZN TIL that although frankincense was introduced to western Europe by Frankish crusaders, that's not why it's called that; it comes from the Old French word "franc," meaning pure or high-quality.
XEkwQ TIL the reason why clocks run clockwise. They do because in the Northern hemisphere that's how sundials cast shadow
4XNO5 TIL elephants often bury dead or sleeping humans or aid them when they are hurt
N7Xj8 TIL about presyncope, a medical condition many people have in which their vision goes black for a brief time after standing up.
J1ww4 TIL that the current world speed record for a commercial train on steel wheels is held by the French TGV at 574.8 km/h (357.2 mph), achieved on 3 April 2007.