A newborn Chinese water deer is so small, it can (almost) be held in the palm of a hand.
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Meysi is one of the world's smallest dogs, measuring in at just 7cm tall, 12cm long, and weighing a meagre 250 grams (only slightly heavier than a hamster!)
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Sea otters hold hands while sleeping so they don’t drift away from each other.
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A group of kittens is called a "kindle".
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Dolphins have names for one another.
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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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