It's a blue jay! It's a green jay! It's a... grue jay? Learn why a hybrid bird spotted in Texas is making headlines across ...

Unusual weather patterns are bringing once-distant bird species into contact, giving rise to rare hybrids that fascinate ...

Q. You once wrote that blue pigment is not known to exist in any terrestrial or freshwater animals with backbones. I found a blue bullfrog in a marsh in Virginia. It was mostly blue with some gray ...

Green is the rarest of all ... In blue eyes, the shorter wavelengths of light (such as blue) are scattered more effectively than longer wavelengths like red or yellow. Due to the low concentration of ...

The study revealed that, contrary to their depictions in popular media, chameleons cannot display patterns on their skin.

Look up on a clear sunny day and you will see a blue sky. But is this the true color of the sky? Or is it the only color of the sky? The answers are a little complicated, but they involve the nature ...

As is the case in any industry, over time, in the power tool world, change is inevitable. For example, looking at Ryobi's catalog, it has transferred over to predominantly battery-powered tools — ...

You're introduced to someone and your attention catches on their eyes. They might be a rich, earthy brown, a pale blue, or the rare green that shifts with every flicker of light. Eyes have a way of ...