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TIL, Texas billionaire and former Presidential candidate Ross Perot wrote a blank cheque to fund and save the 500-year old Treaty Oak in Austin Texas which was poisoned by a vandal

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7rwEx TIL we don't really have a clear understanding of how the Moon formed. There are theories ranging from a planetary collision billions of years ago, to a multitude of smaller collisions resulting in enough mass for it to form. But even then, our moon behaves differently than others in our galaxy.
Y7VaW TIL that the Giotto spacecraft, whose aim was to study Halley's comet as it passed close to Earth in 1986, takes its name from the Italian painter Giotto di Bondone, who in 1305 depicted the star of Bethlehem as a comet in painting his Adoration of the Magi. Halley passed close to Earth in 1301.
XEZrD TIL of George R. Price, a population geneticist known for developing the most widely accepted mathematical interpretation of altruism. After realizing his equation implied that altruistic behavior serves an innate selfish purpose, Price became increasingly depressed and eventually committed suicide.
JbZ1 TIL that there is a disease that makes the body repair injuries using bone, over the course of many years, this leads to the victim becoming more and more like a statue.
wLkVo TIL that a Spanish government worker was absent from work for six years but continued receiving a salary of $41,500 annually and his bosses only found out when he was eligible for a long service award. He retired in the end.