In 2011, archaeologists discovered the skeletal remains of a Roman couple who have been holding hands for 1,500 years.
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Approximately 141 million Valentine's Day cards are exchanged worldwide every year.
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Speed dating was invented by a Rabbi in 1999.
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Close to 110 million roses (mostly red) will be purchased and delivered around Valentine's Day in the U.S.
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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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In medieval Italy, if a man was caught kissing a woman in public, he had to marry her whether he liked it or not.
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When someone looks at a new love, the neural circuits that are usually associated with social judgment are suppressed.
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When you fall in love, that 'high' feeling is caused by a flood of dopamine that is similar to that of cocaine.
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