Pets are a wonderful part of our life. Caring for them can lower our blood pressure and put us in a better mood. But that's not all - here are, for example, 21 impressive facts about animals:

1. Cows can have best friends

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2. A group of flamingos is called a flamboyance

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3. Millions of trees grow every year because squirrels bury their nuts.

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4. Butterflies taste with their "feet"

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5. Otters hold hands while sleeping to stay together

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6. Medusa Turritopsis nutricula can regenerate its own cells, making it immortal

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7. When rabbits jump with excitement and twist, it's called a "Binky"

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8: Humpback whales have a love song ( they have their own music) 

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8: Seahorses are monogamous 

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9: Male puppies often let their female partner win when they play to encourage affection

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10. Monkeys want equality. When a different reward is given for the same task, monkeys tend to get annoyed.

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11: Worms communicate by snuggling against each others

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12: Elephants can show a lot of empathy 

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13: Fish can use tools

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14: The muzzle of a cat is as unique as a fingerprint 

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15 : Dolphins give each other nicknames 

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16: Cows produce more milk when listening to music

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17: A Swift spends his entire life in the air, including when he eats

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18: A group of porcupines is called "a prickle"

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19: Baby monkeys like to play with dolls

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20: Rats can laugh

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21: Quokkas are the most smiling animal

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