The most expensive dog in the world is the Tibetan Mastiff; worth $1.5 million.
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When a male gentoo penguin "falls in love" with a female penguin, he searches the entire beach to find the perfect pebble to present to her.
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The Hercules beetle, despite weighing only 100 grams, can lift 8 kilograms, making it one of the proportionally strongest animals in the world.
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Squirrels will sometimes adopt orphaned baby squirrels that they’re related to.
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Leonardo Da Vinci loved animals so much that he used to buy caged animals at the market just to set them free.
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Cats are one of the only animals to domesticate themselves and approach humans on their own terms.
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