- Fresh apples float because they contain 25% air.
- Each year, the Moon moves away from Earth by about four centimeters.
- Chinese mathematics developed around the 11th century BC and included important concepts related to negative numbers, decimals, algebra and geometry.
- A 1/4 of your bones are in your feet.
- The Taj Mahal in India is made entirely out of marble.
- Lion's can't roar until the age of 2.
- In Africa more people are killed by crocodiles than lions.
- The greyhound is the fastest dog and can reach speeds of up to 72kph (45mph).
- Niagara Falls could fill 4,000 bathtubs every second.
- Sound travels about 4 times faster in water than in air.
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