The average day is actually 23 hours, 56 minutes and 4.09 seconds. We have a leap year every four years to make up for this shortfall.

U.S. bills are 2.61 inches wide, 6.14 inches long, and are .0043 inches thick and weigh 1 gram.

When a polar bear cub is born, it can not see or hear. It takes approximately a month for the cub to start to see and hear.

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