- The number Pi (the ratio of the circumference to the diameter of a circle) can't be expressed as a fraction, making it an irrational number. It never repeats and never ends when written as a decimal..
- A honeybee's top speed is 24kph (15mph).
- Sound travels 4.3 times faster through water than in air.
- Humans shed and regrow outer skin cells every 27 days (almost 1,000 new skins in a lifetime).
- Cheerios cereal was originally called Cheerioats.
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