Sandy, an African Penguin, has been in 'love' with her keeper at the Nuremburg zoo since 1996.
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Wearing red increases attraction.
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The single biggest predictor of love is proximity.
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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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For Valentine's Day 2014, an unnamed man sabotaged a special screening of "Beijing Love Story" at a Shanghai cinema by booking every other seat, subsequently preventing couples from sitting together.
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Sea otters hold hands while sleeping so they don’t drift away from each other.
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Kissing releases masses of oxytocin, a "love potion" that helps couples bond and feel more attracted to each other.
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When you are looking at someone you love, your pupils dilate, they do the same when you are looking at someone you hate.
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