Some scars pull a magic trick. In the womb, fetal skin heals perfectly without scarring. Scientists are still scratching their heads. Why can a baby in the womb fix a wound like a superhero, but you’re stuck with a mark from a pizza burn?
Another weird one: your mouth. Yes, the inside of your cheek heals scars super efficiently. So if you bite your cheek, it’s gone in days. Lips? Same deal. But your knee? Nah. That’s a trophy for life.
