How does a stripy tree snail hide from hungry birds? The Hypselostyla camelopardalis from the Philippines and Reinia variegata from Japan have both evolved a form of dynamic camouflage to survive.

Color-changing mood rings, forehead fever strips and car-shade indicators all change hues as they warm and cool, thanks to a ...

You take what you think is the perfect photo. Then you notice it. Someone in the background. A trash can. Power lines cutting across the frame. Normally, that photo is pretty much ruined. Not anymore.