The human body is full of surprises. Some of them are funny, some are weird, and others are just hard to believe. From bones that glow to brains that eat themselves, here are 10 strange facts about the human body that might blow your mind.

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1. Your stomach gets a new lining every few days

This protects you from digesting yourself. The acid in your stomach is strong enough to break down food — and even metal — but your body knows how to rebuild the lining to keep things safe.

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2. Your bones are stronger than steel

Believe it or not, bone is about five times stronger than steel of the same size. That means your skeleton is pretty tough — even if it doesn’t feel like it when you stub your toe.

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3. You glow in the dark (a little)

Humans actually produce a small amount of light — called bioluminescence — but it’s too faint for our eyes to see. You’re glowing right now, and you don’t even know it.

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4. You have more bacteria than human cells

Your body is home to trillions of bacteria, especially in your gut. In fact, you’re more bacteria than human, technically speaking.

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5. You can survive with half a brain

Some people are born with part of their brain missing or removed — and they live completely normal lives. The brain can adapt in amazing ways.

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6. Your ears and nose never stop growing

While most of your body stops growing after puberty, your ears and nose keep going — slowly but surely. That’s why older people tend to have bigger ears and noses.

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7. Goosebumps are a survival trick

You get goosebumps when you’re cold or scared. It’s a leftover reflex from animals that puff up their fur to look bigger and stay warm.

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8. You shed about 1 million skin cells per day

Your skin is always renewing itself. Every day, you lose about a million tiny flakes of skin — most of which turn into house dust!

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9. You could fill two bathtubs with your saliva each year

Your mouth makes about 1–2 liters of saliva daily. That’s around 730 liters per year — gross, but true.

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10. Your brain sometimes eats itself

In extreme cases (like starvation), your brain can start breaking down its own cells for energy. It’s rare — but yes, it’s possible.

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💡 Final Thought

The human body is one of the weirdest — and most amazing — things on the planet. From glowing skin to never-ending ear growth, it’s full of surprises.

If you enjoyed these strange body facts, check out our article:
“7 Psychological Tricks That Work on Everyone” – next on HackScoop.