Human Body⭐⭐ Curious Wonder
Why do we shiver when we're cold?
Those rapid movements look useless, but the wasted motion is exactly what the body needs.
Take a guessCuriosity category
Human Body
The surprising systems working inside every one of us.
Human Body⭐⭐ Curious Wonder
Why do our eyes water when we yawn?
A wide yawn recruits muscles across the face, including the neighborhood around the glands that make tears.
Take a guessHuman Body⭐⭐⭐ Mind-Blowing Wonder
Why do our voices sound different on recordings?
While you speak, your ears receive your voice by two routes. A recording plays back only one.
Take a guessHuman Body⭐⭐ Curious Wonder
Why do onions make us cry?
The trouble begins only after a knife breaks open thousands of tiny plant cells.
Take a guessHuman Body⭐⭐ Curious Wonder
Why do we stretch when we're tired?
That full-body reach after a yawn has a scientific name, and humans are far from the only animals that do it.
Take a guessHuman Body⭐⭐⭐ Mind-Blowing Wonder
Why do babies have more separate bones than adults?
A newborn is tiny. An adult is much bigger. Somewhere between those two skeletons, the count changes.
Take a guessHuman Body⭐⭐ Curious Wonder
Why do cuts itch when they heal?
A small cut can stop hurting, behave itself for a while, and then suddenly itch like it has urgent news.
Take a guessHuman Body⭐⭐ Curious Wonder
Why do we blush when we're embarrassed?
Someone says your name at the worst possible moment, and your face starts giving you away before you can explain anything.
Take a guessHuman Body⭐⭐ Curious Wonder
Why do we get butterflies in our stomach?
You see your crush. Your name gets called in front of the whole room. You're about to do something scary. And suddenly your stomach is fluttering like it has its own opinion about all this.
Take a guessHuman Body⭐⭐⭐ Mind-Blowing Wonder
Why do we have fingerprints?
Look closely at your fingertip. It is covered in tiny loops, arches, and ridges instead of being smooth.
Take a guessHuman Body⭐⭐⭐ Mind-Blowing Wonder
Why can't you tickle yourself?
Try to tickle your own ribs and the whole thing falls flat. The same spot can betray you instantly when someone else tries.
Take a guessHuman Body⭐⭐ Curious Wonder
Why do we get goosebumps?
A cold breeze. A huge chorus. A scary scene. Suddenly your skin is covered in tiny bumps.
Take a guessHuman Body⭐⭐ Curious Wonder
Why do we laugh?
Laughter can escape before you have decided whether anything was funny.
Take a guessHuman Body⭐⭐⭐⭐ Reality-Bending Wonder
Why do we dream?
You close your eyes, lose track of the real room, and your brain starts making places that were never there.
Take a guessHuman Body⭐⭐⭐ Mind-Blowing Wonder
Why do fingers wrinkle in water?
Stay in the bath long enough and the skin on your fingertips starts forming deep little wrinkles. Why does soaking in water do that?
Take a guessHuman Body⭐⭐ Curious Wonder
Why do we hiccup?
One second you are breathing normally. The next second your body makes a tiny ridiculous sound without asking.
Take a guessHuman Body⭐ Everyday Wonder
Why do we yawn?
Your mouth opens. Your eyes squeeze shut. You take one enormous breath, usually without deciding to do any of it. Why does your body suddenly need to yawn?
Take a guessHuman Body⭐⭐ Curious Wonder
Why do we get brain freeze?
The ice cream is in your mouth. The pain shows up in your forehead. Your body has some explaining to do.
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