Biology
Healing Mechanisms
Quick fact
Human embryos can heal skin wounds without scarring, a ability lost after birth—a hint at the regenerative potential we once had.
Why this is interesting
A paper cut can seem trivial, yet it sets off a perfectly orchestrated construction project inside your body—one that involves clotting, inflammation, and even the creation of new skin. But why do some wounds heal flawlessly while others leave a scar?