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TIL McDonald's in Sedona, Arizona is the only McDonald's with turquoise instead of golden arches, because the government deemed the yellow ones to be contrasting too much with the surrounding area's scenic rock and opted for bluish-green arches instead.

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LknLp TIL that blood being blue until coming in contact with oxygen is a myth. Veins appear blue through our skin because red wavelengths are absorbed by our skin more than blue wavelengths resulting in the appearance of blue veins.
D16MD TIL Blue Whales eat between 20 and 50 million calories every day. That's approximately what a human adult eat in 50 years (2500 calories/day). In the words of the researcher himself, "that is about 70 to 80 thousand Big Macs".
8NrP TIL that Cuba offered to send 1600 medics after Katrina, but the United States rebuffed them - while at the same time welcoming international help
ep6Xk TIL Only a handful of tourists today visit one of the Roman Empire’s most beautiful cities, Leptis Magna, now located in Libya. Well preserved, there has been no direct attacks or threats against this UNESCO World Heritage site
Jra8 TIL of Cymothoa exigua - a parasite that severs the blood vessels of a fish’s tongue and becomes a new functional tongue. Only known parasite to replace an entire organ.