The single biggest predictor of love is proximity.
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Ten seconds of hugging a day increases levels of oxytocin, which can reduce blood pressure, thus cutting the risk of heart disease.
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When dragonflies mate, their tails form a love heart.
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Approximately 141 million Valentine's Day cards are exchanged worldwide every year.
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One in five long-term love relationships began with one or both partners being involved with others.
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Gary Kremen, founder of match.com, lost his girlfriend to a man she met on match.com.
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Falling in love raises levels of nerve growth in a person's brain for about a year and can improve their memory.
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Sandy, an African Penguin, has been in 'love' with her keeper at the Nuremburg zoo since 1996.
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