Blue whale arteries are large enough for humans to swim through and their hearts are the size of cars.
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An average heart beats 100,000 times a day, pumping some 2,000 gallons of blood through its chambers. Over a 70-year life span, that adds up to more than 2.5 billion heartbeats.
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The lifespan of mammals is about 1 and a half billion heartbeats.
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It's possible to die from a broken heart; it's called Stress Cardiomyopathy.
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20 minutes after smoking a cigarette, blood pressure drops to normal.
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Research has shown that allowing chocolate to melt in your mouth produced brain and heart rate activity that was simliar to - and even stronger than - that produced with passionate kissing.
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Quality dark chocolate contains flavonoids which help reduced the risk of heart disease.
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