- William Henry Harrison (allthetropes.org)
William Henry Harrison had a brilliant idea for his inauguration. Facing accusations that he was old and frail, as well as unintelligent, he decided to deliver an eloquent two-hour inauguration speech (which had already been edited for length). Outside. In cold weather. In the rain. Without warm clothes on. And then went out dancing.
- Pythagorean theorem (Wikipedia)
In mathematics, the Pythagorean theorem or Pythagoras’ theorem is a fundamental relation in Euclidean geometry between the three sides of a right triangle. It states that the area of the square whose side is the hypotenuse (the side opposite the right angle) is equal to the sum of the areas of the squares on the other two sides.