The feature begins 600 million years ago when fish creatures could see full colour (and also ultra violet light). It then talks about how our ancestors lost and then gained back colour receptors and how some people today are colour blind or have enhanced colour vision.
Heres the article in full if your interested.....http://www.newscientist.com/article/mg22630170.400-eye-of-the-beholder-how-colour-vision-made-us-human.html
Click on the image to enlarge.
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