- 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.
- The surface area of a brick is 79 cm squared.
- Bull's can run faster uphill than down.
- At the deepest point in the ocean, the water pressure is equivalent to having about 50 jumbo jets piled on top of you.
- The most abundant metal in the Earth's crust is aluminum.
- Diamonds are the hardest substance known to man.
- VHS stands for Video Home System.
- A giraffe can go longer without water than a camel.
- Koalas sleep around 18 hours a day.
- Every year over 98% of atoms in your body are replaced.
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