Medically reviewed by Jay N. Yepuri, MD Normal poop color is light to dark brown and often changes due to your diet.Green ...

Is your green my green? Probably not. What appears as pure green to me is likely to look a bit yellowish or bluish to you. This is because visual systems vary from person to person. Moreover, an ...

Normally green iguanas sometimes turn orange, or pumpkin, around the holiday season. But it's not a holiday thing for these invasive species.

A team of researchers says there's a new color in the atmosphere. But here's the deal: You can see it only by being shot in the eye with a laser. Scientists at the University of California, Berkeley, ...