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TIL that birds' beaks are not a solid, exposed bone, but instead are a bony structure covered in translucent living tissue that can change color at different times of the year, when they are breeding, or based on their diet/health.

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8eLdZ TIL nonviolent protests engaging a threshold of 3.5% of the population have never failed to bring about change
BoaL TIL Nasir ad-Din Tusi, a Persian polymath, developed a theory of evolution by natural selection 600 years before Darwin. He wrote that hereditary variability is the leading force of evolution, and that organisms which can change faster are ‘more variable’, thus giving them an advantage over others
Q89e TIL that Grizzly bears have a bite-force of over 8,000,000 pascals, which is enough to crush a bowling ball.
Wkbw9 TIL there's an active petition happening to rename the city of Columbus, Ohio (Guy Fieri's place of birth) to "Flavortown". It's nearing its 150,000 signature requirement.
6EY7w TIL in Pokemon Red/Blue, the remaining Pokemon that doesn't get picked by you or your rival is kept by Professor Oak. You can perform a glitch in the game to battle Professor Oak and he has that unused starter Pokemon at its final evolution along with a team of Pokemon on par with the Elite 4's.