- Tokyo was once known as Edo.
- The average hen lays 228 eggs a year.
- Crocodiles swallow rocks to help them dive deeper.
- 'underground' is the only word that begins and ends with the letters 'und'.
- The name of the popular search engine 'Google' came from a misspelling of the word 'googol', which is a very large number (the number one followed by one hundred zeros to be exact)..
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