- Acorns are poisonous to humans (if eaten it can cause damage to your kidneys).
- The Greek national anthem has 158 verses.
- The smallest ten prime numbers are: 2, 3, 5, 7, 11, 13, 17, 19, 23 and 29..
- Crocodiles continually grow new sets of teeth to replace old ones.
- An elephant's trunk can hold over 5 litres of water.
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