Why Do People Get Goosebumps?

Wonder Project Examples

Humans inherit goosebumps from our animal ancestors. When geese and turkeys get their feathers plucked, it leaves little bumps. That is why they are called goosebumps. Goosebumps are made when tiny muscles around each hair on your arm contract to keep the warm air inside. This makes the hair on your arms stand up. Goosebumps don't warm humans up because we don't have enough hair so there aren't as many muscles to create enough goosebumps.
Goosebumps are uncontrollable so we can't make them go away. Goosebumps usually go away really fast. We can't control them just like we can't control blushing and sweating.
Humans usually get goosebumps when we are cold or scared but the reason we get them is still unknown. Scientists believe that we get them from the earlier humans which had more hair on their bodies. They might have made humans look bigger to scare off animals or other humans. It could have also kept them warm because they had more hair.