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TIL Mongolian custom called ´coaxing ritual for camels´, when a female camel is rejecting her new-born calf, or to adopt an orphaned calf. The rite consists of playing music, the melody gradually induce deep feelings and so touches the female camel making her less aggressive and even cry.

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rRGM4 TIL of Dennis H. Klatt, a computer scientist who programmed Stephen Hawking's voice box. He tirelessly worked on the code while undergoing treatment for cancer, which eventually took his own voice, and his life. Hawking never changed his voice program, saying, "My friend Dennis' voice is my voice"
VM9pm TIL about the Darwin's frog. The males of this small Chilean frog swallow the embryos to finish the tadpoles development inside their vocal sac. The "pregnant dad" does not eat for around six weeks until the froglets move to the mouth and get out
VBYE0 TIL more than 90% of cigarettes sold worldwide have a filter.These filters are typically made of a plastic called cellulose acetate, and are not biodegradable.
rRpB0 TIL in 1956, the first modern American mall opened-- the Southdale Shopping Center in Edina, Minnesota. Upon touring, architect Frank Lloyd Wright criticized it "had all the evils of the village street and none of its charm... You should have left downtown downtown." History proved Wright wrong.
66Mm TIL: The original word for “bear” (the animal) has been lost. Superstitious people in medieval times thought that saying the ferocious animal’s name would summon it, so they used a euphemism that meant “the brown one” (“bear”) … The original word was never recorded, so it remains a mystery.