Seeing without eyes: Visual pathways of hydras and humans are alike
Monday, March 5, 2012 - 16:32
in Biology & Nature
What good is half an eye? Evolutionary biologists studying the origins of vision get that question a lot, and new research points to a possible answer. New findings indicate that, even in the absence of eyes altogether, some creatures display a light-sensitivity that uses the same visual pathway that allows humans to see.