- 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.
- Artificial Christmas trees have outsold real ones every year since 1991.
- Different names for the number 0 include zero, nought, naught, nil, zilch and zip..
- Female condors lays a single egg once every 2 years.
- Jellyfish have been on Earth for over 650 million years.
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