- Every year over 98% of atoms in your body are replaced.
- Dolphins sleep with one eye open.
- A suction cup will not work in outer space.
- A chameleon's tongue is twice as long as its body.
- The lie detector was invented in 1921.
- Mercury is the only metal that is liquid at room temperature.
- A female ferret is called a jill.
- The first English dictionary was written in 1755.
- There are over 900,000 known species of insects.
- Clouds fly higher during the day than the night.
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