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TIL Dog breeds differ in intelligence and have been graded according to the trainability aspect of their intelligence. The dogs considered to be the smartest are the ‘Border Collies’ and the dumbest are the 'Afghan Hounds.’

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MerVV TIL that when "Feed the Birds" was being played at Walt Disney's 100th Birthday celebrations in 2001 by Richard Sherman, a small bird landed on the piano on which he was playing. It was Walt's favourite song and Richard swears that it must have been Walt coming to listen once again.
kJGeg [TIL] The concept of zero as a number was first developed in India, and its use spread to the Islamic world and then to Europe.
69Y48 TIL that salt was used to preserve mummies. They used natron, a salt mix (including table salt) to dehydrate and disinfect them. Natron was quite the hit, and had many many uses: soap, teeth cleanser, mouthwash, insecticide and more
XEoMX TIL: 'One of the largest human experiments in history' was conducted on unsuspecting residents of San Francisco. Over the next 20 years, the military would conduct 239 "germ-warfare" tests…
xd9o TIL that after the Great Fire of London, an economist by the name of Nicholas If-Christ-had-not-died-for-thee-thou-hadst-been-damned Barebone played a major role in pioneering fire insurance. (His very religious father, Praise-God Barebone chose his somewhat unusual middle name)