- Paper money was first used in China.
- Diamonds are the hardest substance known to man.
- Sound travels 15 times faster through steel than air.
- A pigeon's feathers are heavier than its bones.
- Pigs can get sunburn.
- The dollar was established as the official currency of the US in 1785.
- When recognising a persons face you use the right side of your brain.
- Americans consume over 10 billion bowls of soup each year.
- 55% of all movies are rated R.
- All hurricanes form over the sea and can last up to 10 days.
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