The color of dark spots may depend on the tone of a person’s skin, but they may range from light to dark brown or gray-brown, depending on the cause. Dark spots also vary in size and can develop ...

DESCRIPTION: The brown pelican is a large, dark seabird with a long bill and extensible throat pouch, about four feet overall length with a wingspan of six to seven feet and weighing about four to 11 ...

Let’s revisit our friend myoglobin. Myoglobin has three color states: purple, red, and gray/brown. We touched on how the gray/brown state can occur after prolonged storage, but that color shift ...