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TIL about a bird called a green jay, a brilliant green, yellow, and blue jay of the tropics whose range barely stretches to southern Texas.

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via reddit.com

9Yr8p TIL about the "Immovable Ladder" which has sat on a wall of the Church of the Holy Sepulchre in Jerusalem since at least 1728. It cannot be permanently moved without the agreement of six different Christian denominations, which has never been achieved.
Z8Z8Y TIL that 18th Century stereotype of the "lazy southerner" was caused by widespread hookworm infections, which caused poor southerners to be lethargic, malnourished, stunted, and mentally retarded.
6EDKm TIL That Muay Thai fighters would deaden the nerves in their shins, and train so that their shins would be rock hard with no feelings while fighting.
ELRd TIL despite the ongoing Arab Boycott of Israel since 1948, Israel has achieved a higher GDP than all of the participants except for the oil rich Kuwait and Qatar, and the participants stand to lose $30 billion from not trading with Israel by 2020.
4kNkN TIL of camoflauge trees: WWI-era hollow, fake trees placed in no man's land to spy on enemy trenches