Friday, December 14, 2007

Summary of Gecko Night Vision

They're the first vertebrates to be able to tell different colors in dim light. They have two kinds of cells in their eyes-cones and rods. Cones detect colors when there's light, and rods can only see in black and white. Gecko's pupils are nearly closed in bright light, and wide open in dim light. Scientists tested the lizard's under low levels of light, similar to dim moonlight. Scientists trained crickets to see blue or gray in dim light. The most active lizard is the helmet gecko. The results said that geckos could see in the dark. Geckos learn that blue meant yummy and grey meant yucky! [:
by hailey & jasmyn
URL:
http://www.sciencenewsforkids.com/articles/20041208/Note3.asp