When you’re next staring deep into the eyes of your partner ... only (this) one type of pigment.” Melanin – made up of melanocyte cells – is naturally dark brown in color but has the ...

and the amount that they have determines their eye color. There's really only (this) one type of pigment. Melanin, a pigment also found in skin and hair, is naturally dark brown. It can absorb ...

During an average day, the image we have of ourselves clashes with those construed by innumerable pairs of strange eyes ... brown into amber and showing with steel-hard clarity the heaps of ...