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TIL Hoba, the largest known meteorite left no crater on Earth. Earth’s atmosphere slowed the object to the point of terminal velocity. Hoba meteorite is also the most massive naturally occurring piece of Iron known at the Earth’s surface.

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via reddit.com

rKnw TIL that when the 1937 Marijuana Tax Act was passed, only the birdseed industry successfully lobbied against it by arguing that hemp seeds gave birds shinier feathers than other seeds. Because of this, birdseed producers are legally allowed to import hemp seeds into the US (deactivated) today.
16Wxd TIL that both successful and unsuccessful attempts at humor increase perceived confidence, but only successful attempts also increase perceived competence and social status
KYKx4 TIL all Hubble Telescope images are all false color – meaning they start out as black and white, and are then colored.
KYDxQ TIL that the 2001 film Shrek is based on a book.
KOBEJ TIL Sloths can swim three times faster than they can walk on land. And because of their ability to slow their heart rates to one-third its normal rate, they can also hold their breath for a whopping 40 minutes under water.