Researchers have identified a 3D fragment of fossilized skin that is at least 21 million years than previously described skin fossils. The skin, which belonged to an early species of Paleozoic reptile ...

Hyperpigmentation can affect many skin tones, but it’s often more intense and can last longer on dark skin. Hyperpigmentation is when an area of skin becomes darker than the skin that surrounds it.

There are two types of skin pigmentation disorders: hyperpigmentation, in which the skin produces too much melanin, and hypopigmentation, in which the skin produces too little melanin. Skin ...