- Greek philosopher and mathematician Pythagoras lived around the year 500 BC and is known for his Pythagorean theorem relating to the three sides of a right angle triangle: a^2 + b^2 = c^2.
- The naming of tropical storms and hurricanes officially began in 1953.
- Mercury is the only metal that is liquid at room temperature.
- The 'black box' that houses an airplanes voice recorder is actually orange so it can be more easily detected amid the debris of a plane crash.
- The word 'underground is the only word that begins and ends with the letters 'und'.
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