Lots More Information
- How Sweat Works
- Why do humans have body hair?
- Why is the hair on your arm short but the hair on your head long?
- How fast does hair grow?
- How Hair Replacement Works
- How Hair Coloring Works
Eyebrows add expression to your face, and are often waxed and plucked in the name of beauty. But why do we have them in the first place, and what would happen if they went away?
You may never have thought about it (unless your child asks), but boogers are sticky for a perfectly logical scientific reason.