- The expression to 'knuckle down' originated from playing marbles (players used to put their knuckles to the ground for their best shots).
- Tiger shark embryos begin attacking each other in their mother's womb before they are even born.
- Texas is the only state that permits residents to cast absentee ballots from space.
- Mosquitoes prefer children to adults and blondes to brunettes.
- The D.C. in Washington D.C. stands for District of Columbia.
- The fastest fish in the sea is the swordfish and can reach up to speeds of 108kph (68mph, 59knots).
- The average cow produces 40 glasses of milk a day.
- There are 7 points on the Statue of Liberty's crown.
- Americans eat 35,000 tons of pasta a year.
- Greyhounds can see better than any other dog breed.
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