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Your heart beats about 100,000 times every day.

Your heart beats about 100,000 times every day.

That adds up to around 35 million beats a year, quietly pumping blood to every part of your body without ever taking a break. Over a whole lifetime it beats more than 2.5 billion times.

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You are a little taller in the morning than at night. You are a little taller in the morning than at night. You can’t tickle yourself. You can’t tickle yourself. Your bones are alive, and they grow with you as you get bigger. Your bones are alive, and they grow with you as you get bigger. Babies are born with about 300 bones, but grown-ups have only 206. Babies are born with about 300 bones, but grown-ups have only 206. Your funny bone isn't a bone at all — it's a nerve in your elbow. Your funny bone isn't a bone at all — it's a nerve in your elbow.