- A Sphygmomanometer measures blood pressure.
- 1 gigayear = 1,000,000,000,000 years.
- Your blood is 6 times thicker than water.
- In France, it's illegal for employers to send emails after work hours.
- Sound travels 4.3 times faster through water than in air.
- The average human drinks over 60,566 litres (16,000 gallons) of water in a lifetime.
- The number 2 is the only number greater than zero that when added to or multiplied by itself gives you the same result (4).
- Some cats are allergic to humans.
- Sound travels 15 times faster through steel than air.
- Italian mathematician Leonardo of Pisa (better known as Fibonacci) lived between the years 1170 and 1250 and is best known today for Fibonacci numbers, the number sequence named after him. Fibonacci introduced the number sequence to Western Europe in his book 'Liber Abaci' after they had been described earlier by Indian mathematicians.
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