In just about every species of mammal, the female lives longer than the male.
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Parrotfish make themselves a kind of mucus 'sleeping bag' which masks their smell from predators and keeps parasites away.
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The world's smallest mammal is the bumblebee bat of Thailand, weighing less than a penny.
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Goldfish remember better in cold water than warm water.
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The most expensive cow in the world was sold in 2009 for $1.2 million.
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Slugs have 4 noses!
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Camels and llamas can cross breed. The offspring is called a ‘Cama’.
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