- The atomic symbol for iron is Fe (the original name for iron was Ferric).
- Your fingernails grow faster when you are cold.
- Reindeer hair is hollow inside like a tube.
- 40% of Amsterdam commuters get to work by bicycle.
- Forty percent of twins invent their own language.
- The average hen lays 228 eggs a year.
- Salt used to be a currency.
- A moth has no stomach.
- A chameleons tongue is twice the length of its body.
- Less than 3% of the water on Earth is fresh.
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