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TIL chess in a mandatory subject in Armenian schools
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epB9k
TIL about a phenomenon in mines called rock burst. Rock bursts occur when mining tunnels alter the pressure placed on nearby rocks which can cause the rocks to explode. Miners are killed every year by rock bursts.
D1KAe
TIL about the McGold Card. A McDonald’s specialty card that grants 2 free meals, every week, for fifty years to the card holder. Notable holders include Bill Gates and Warren Buffet.
DQvmD
TIL about the Amami rabbit, a native of Ōshima, that is reminiscent of ancient rabbits and only exists on two small islands in Japan.
Eevx
TIL that in 2013 a grad student accidentally debunked an influential economics paper. He was trying to replicate the paper’s math for a school project and couldn’t, because it was completely wrong.
5Yk09
TIL Mexico issued a ban known as "Avandarazo" in response to the Festival de Avándaro, forbidding the recording of Rock music by national groups, the prohibition of its sales in retail stores, live rock concerts and airplay of rock songs. The ban lasted for many years, gradually lifted in the 1980s.