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TIL a Troy ounce of Gold is more than twice as valuable as a Troy ounce of platinum

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1arXd TIL during the opening of 1936 Olympic,Adolph Hitler made a speech which was broadcasted in 41 countries.Due to the high frequency of the signal,it escaped the earth ionosphere.Carl Sagan wrote his book Contact,on alien-human encounter based on this platform that alien heard Hitlers voice first.
Wkmv4 TIL Denmark and Sweden holds the world record for most wars fought between two countries, with around 30 wars fought since the 15th century.
v6j8 TIL that in 1890 an Oberlin College professor gave a lecture on then-rare aluminum, stating ‘if anyone could make this on a commercial scale, he would be a benefactor to the world and would also make a great fortune.’ In attendance was Charles Hall, who took him up on the challenge – and succeeded.
W7RR8 TIL 40% of white medical trainees believed black people having thicker skin or less sensitive nerve endings in a 2016 survey
AND4n TIL a Japenese soldier spent 27 years hiding in the jungles of Guam because he didn't know that WWII was over