- Mathematical developments increased rapidly around the time of the Italian Renaissance in the 16th century and continued through the scientific revolution of the 17th and 18th centuries, becoming increasingly abstract in the 19th and 20th centuries..
- The cheetah is the only cat that can't retract it's claws.
- Chevy Chase's real first name is Cornelius.
- Scorpions glow under ultra violet light.
- Jack is the most common name in nursery rhymes.
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