- The side of a hammer is called a cheek.
- 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..
- Ferrets sleep between 18 - 20 hours a day.
- A 'googolplex' is the number 1 followed by a googol zeros, a number so ridiculously big that it can't be written because there literally isn't enough room in the entire universe to fit it in!.
- Tennis was originally played with bare hands.
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