Money notes are not made from paper, they are made mostly from a special blend of cotton and linen. In 1932, when a shortage of cash occurred in Tenino, Washington, USA, notes were made out of wood for a brief period.

The call of the humpback whale is louder than Concorde and can be heard from 500 miles away.

Hawaii is the only U.S. state never to report a temperature of zero degrees F or below.

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