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TIL that 29% of San Francisco’s air pollution comes from China

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81e8 TIL that the positions of a windmill’s blades when stopped signal specific pieces of information.
69vYJ TIL In 2006 Disney traded Al Michaels to Universal to regain the rights to Walt Disney's first character, Oswald the Rabbit
yQyMw TIL about "A True Story", the first sci-fi novel written by a Greek-speaking Syrian in the 2nd century AD. This satire is the earliest known work of fiction to include travel to outer space, alien lifeforms, and interplanetary warfare.
VBnyp TIL that pigeons, sort of, produce milk
pX6e TIL the average color of all light in the universe is a shade of beige called Cosmic Latte