- A deck of cards should be shuffled at least 7 times before playing.
- 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..
- Hawaii was originally called the Sandwich Islands.
- A moth has no stomach.
- Natural gas has no smell (the odor is artificially added so that people are able to identify leaks).
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