- Rainbows can only be seen in the morning or late afternoon (the sun needs to be less than 40 above the horizon).
- The Fibonacci sequence: 0, 1, 1, 2, 3, 5, 8, 13, 21, 34, 55, 89, 144, 233, 377, 610, 987, ....
- A car travelling at 80kph (50mph) uses half its fuel to overcome wind resistance.
- Queen termites can live up to 50 years.
- The 'black box' that houses an airplanes voice recorder is actually orange so it can be more easily detected amid the debris of a plane crash.
- Your fingernails grow faster when you are cold.
- Ocean algae produces about 75 percent of the world's oxygen.
- Bats are the only mammals that fly.
- Fingernails grow faster than toenails.
- The world's first paved streets were laid in Rome in 170 B.C.
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