- Gorillas can't swim.
- Hens do not need a rooster to lay an egg.
- Every ton of recycled paper saves about 17 trees.
- Brontology is the study of thunder.
- 2 and 5 are the only prime numbers that end with a 2 or a 5.
- The first crossword puzzle appeared in 1913.
- Many mammals, including cats and dogs, walk on their toes in contrast to humans, who walk on the soles of their feet.
- A group of porcupines is called a prickle.
- All babies are born with blue eyes.
- The moon is 27% the size of the Earth.
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