- The skeleton of an African elephant accounts for about 15% of its body weight.
- Dark green lettuce leaves are more nutritious than lighter ones.
- A bowling pin will fall at a tilt of 7.5 degrees.
- 32% of all land in the U.S. is owned by the government.
- The spikes of a newborn hedgehog begin to appear within 24 hours.
- A car travelling at 80kph (50mph) uses half its fuel to overcome wind resistance.
- The statue of Liberty's mouth is 3 feet wide.
- Hippopotamuses have killed more people in Africa than any other animal.
- The compass and straight edge were powerful tools in the advancement of geometry, allowing the construction of various lengths, angles and geometric shapes.
- You can only see a rainbow if you have your back to the sun.
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