- A Sphygmomanometer measures blood pressure.
- Hawaii was originally called the Sandwich Islands.
- 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).
- Sharks never stop moving even when they sleep or rest.
- Peanut butter can be converted into diamonds.
- Walruses are true party animals; they can go without sleep for 84 hours.
- Every single possible 3 character .com domain has been registered.
- The symbols used for addition (+) and subtraction (-) have been around for thousands of years but it wasn't until the 16th century that most mathematical symbols were invented. Before this time math equations were written in words, making it very time consuming.
- Australia is the only country that is also a continent.
- A group of kangaroos is called a mob.
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