What Makes Hair Curly or Straight? | COLOSSAL QUESTIONS?

Hair is curly or straight because of how tiny parts inside hair are shaped, like little springs or straws.

Imagine your hair is made of tiny, straw-like tubes called hair shafts. If these tubes are all the same shape and size, like straight straws, your hair will be straight, just like a pencil. But if they're twisted or bent, like curly straws, your hair will be curly, like a spring.

Inside every strand of hair is something called keratin, it's like the building block of hair, kind of like glue that holds everything together. If keratin is arranged in a twisted pattern, the hair shaft becomes curly. It’s like when you twist a straw before putting it into a drink, it stays twisted even after you take it out!

If keratin is arranged more evenly, the hair shaft stays straight, just like a plain straw.

So whether your hair is curly or straight depends on how these tiny tubes are shaped inside, and that’s all because of how the keratin is built!