- 20% of China's plants are used in medicine.
- A fire will burn faster moving uphill than downhill.
- The diameter of Earth is 12,756 km (7,926 miles).
- The Hawaiian alphabet has only 12 letters.
- The rarest type of diamond is green.
- Owls can't move their eyes from side to side.
- Polar bears are strictly carnivores.
- A crocodile cannot move its tongue.
- You can start a fire with ice.
- The oldest known vegetable is the pea.
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