Coupons were introduced in 1894 when Asa Candler bought the Coca-Cola formula for $2,300 and gave people coupons that he had written out to receive a free glass of coke.

Some birds have been know to put ants into their feathers because the ants squirt formic acid, which kills parasites.

Each year, the Moon moves away from Earth by about four centimeters.

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