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The journey of Orient Express from Paris to Istanbul lasted a little over 80 hours.

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KO7vJ TIL that Kevin Clash, the voice & puppeteer behind Elmo (until his resignation in 2012) was also the puppeteer and voice of Master Splinter in the first two live action TMNT movies from 1990 & 1991.
kODD1 TIL we can’t see green stars (because of how black-body spectrum works)
grnL9 TIL Helium-3 found in crystals on the moon could provide energy to the earth
wog77 TIL secondhand and thirdhand smoke from cigarettes contributes to 40,000 deaths annually in the United States. Thirdhand smoke can linger on household surfaces for years if not properly cleaned.
Me5N0 TIL that Naspers, a South African company that "formed an integral part of the power structure which implemented and maintained apartheid", today has a 31% stake in Tencent, making it Tencent's largest shareholder