- Gorillas burp when they are happy.
- The world's smallest mammal is the bumblebee bat of Thailand.
- The elevator was invented in 1850.
- The world's most expensive spice is saffron.
- Half of all crimes are committed by people under the age of 18.
- Sound travels 15 times faster through steel than air.
- Shrimps are all born male but slowly grow into females.
- Camels are born without humps.
- Hens do not need a rooster to lay an egg.
- Sound travels 4.3 times faster through water than in air.
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