In 2011, archaeologists discovered the skeletal remains of a Roman couple who have been holding hands for 1,500 years.
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A group of pugs is called a grumble.
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There's a young hippo and a 130+ year old tortoise in a Kenyan wildlife preserve who are best friends and they even sleep and play together.
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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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Squirrels will sometimes adopt orphaned baby squirrels that they’re related to.
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When dragonflies mate, their tails form a love heart.
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Dolphins have names for one another.
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