Here, the evolution of the eye:
![[Image: evolution2.jpg]](https://images.weserv.nl/?url=www.doctorergo.com%2Fimages%2Fevolution2.jpg)
The first stage is just a layer of photosensitive cells. Eventually, the layer becomes a cup, as to sense the direction of the light. Then the opening gets more narrow so that it becomes more accurate, then we get pupils, ect.
And this video is a beautiful presentation of Evolution by Mr. Carl Sagan: http://www.youtube.com/watch?v=gZpsVSVRsZk
![[Image: evolution2.jpg]](https://images.weserv.nl/?url=www.doctorergo.com%2Fimages%2Fevolution2.jpg)
The first stage is just a layer of photosensitive cells. Eventually, the layer becomes a cup, as to sense the direction of the light. Then the opening gets more narrow so that it becomes more accurate, then we get pupils, ect.
And this video is a beautiful presentation of Evolution by Mr. Carl Sagan: http://www.youtube.com/watch?v=gZpsVSVRsZk
![[Image: SigBarSping_zpscd7e35e1.png]](https://images.weserv.nl/?url=i169.photobucket.com%2Falbums%2Fu224%2FUchiha_Kina%2FTags%2FSigBarSping_zpscd7e35e1.png)