Dr. James Faber is professor of cell biology and physiology at the UNC School of Medicine. Here he explains how principles of chemistry and physiology combine to create the color scheme of blood.

Blood oranges are the ultimate surprise fruit inside. They may look like a traditional orange on the surface, but inside, their vibrant, deep crimson flesh and sweet, tangy juice set them a world ...

Blood is red to the naked eye. Under a microscope, it depends. This isn't because it isn't really red, but rather because its redness is a macroscopic feature. Human blood is red because hemoglobin, ...