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When you get cold, tiny muscles make the hairs on your skin stand up.

When you get cold, tiny muscles make the hairs on your skin stand up.

This gives you goosebumps. It is your body's way of trying to keep you warm.

🧍 All Body facts →

More facts about Body

Your heart beats about 100,000 times every day. Your heart beats about 100,000 times every day. 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.