Gecko night vision

Certain geckos can tell colors apart even in dim moonlight.

By Emily Sohn, 00:00 AM November 30, 2004

Try this: Go outside at night with a box of crayons and a blank piece of paper. Without looking at the crayon labels, pick one out and draw something on a piece of paper. Then, look at your drawing and try to guess what color it is. Chances are, you'd be wrong. That's because people have a hard time seeing colors in the dark.


Geckos, apparently, don't have this problem. They're the first vertebrates known to be able to tell the difference between blue and gray, even when the light is very dim...

Source URL: