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.

A "hairbreadth away" is 1/48 of an inch.

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

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