Anatomists have long held that white skins are tinted by three pigments: melanin, a black chemical; hemoglobin, a reddish substance which colors the blood; oxyhemoglobin, a form of .
It is said that once, when the talented toddler fell and cut his forehead, he inspected the blood with detachment and asked: "Is it oxyhemoglobin or carboxyhemoglobin?".