- There are 2 chickens for every person.
- 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.
- Sponges hold more cold water than hot.
- Paper money was first used in China.
- The yo-yo was originally used as a weapon for hunting the in the Philippines.
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