- The number of times a cricket chirps in 15 seconds, plus 37, will give you the current air temperature.
- Onions are part of the lily family.
- You might have heard the word 'infinity' before or seen its symbol that looks like the number 8 placed on its side. Infinity means a limitless quantity or something that goes on forever. While it's not really a number like 1, 2 or 3, infinity is often used in math as part of equations and formulas.
- What comes after a million, billion and trillion? A quadrillion, quintillion, sextillion, septillion, octillion, nonillion, decillion and undecillion.
- Australia is the only country that is also a continent.
- There are over 2,500 different types of mushrooms.
- The average age at which America's presidents have taken office is 54.
- The teeth of a viperfish are so sharp and long that if it closed its mouth with the teeth inside, it would pierce its brain.
- The first toothbrush was invented in 1498.
- There is a 50% chance that in a group of 23 people, two will share the same birthday. In a group of 367 people, it is a 100% chance. But only 70 people are required for a 99.9% chance.
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