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TIL Racing stripes were originally used to help drivers realign a spun out car with the road

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M71GW TIL that the manta ray has the biggest brain and by far the biggest brain-to-mass ratio of any fish and is one of the few animals in the world that may pass the "mirror test" for self-recognition.
b60Ja TIL: The ubiquitous anti-piracy commercials used on DVDs used pirated music.
RQ49 TIL that Hempcrete is a hemp-based concrete alternative that turns to Limestone by absorbing CO2 during the first 100 years after it’s cast, making it a truly carbon negative building material.
1aKEV Today I learned Johnny Appleseed was basically a mentally unstable weirdo that welcomed himself into a stranger's house and refused to leave until they fed him.
NLJQ TIL in 1859, an aurora was so powerful that it allowed telegraph operators to communicate without batteries and solely from the charge emitted from the aurora.