Human vision compared to animal vision

We are evolved to be sensitive to skin tone

Screen Shot 2014-08-21 at 4.49.50 pm

full article here: http://www.ncbi.nlm.nih.gov/pmc/articles/PMC1618887/

FYI – some animals see different colours to us

http://www.nature.com/news/mantis-shrimp-s-super-colour-vision-debunked-1.14578

“If the shrimp eye compared adjacent spectra, like the human eye does, it would have allowed the animals to discriminate between wavelengths as close as 1–5 nanometres, the authors say. Instead, each type of photoreceptor seems to pick up a specific colour, identifying it in a way that is less sensitive than the human eye but does not require brain-power-heavy comparisons. That probably gives the predatory shrimp a speed advantage in distinguishing between different-coloured prey, says Roy Caldwell, a behavioural ecologist at the University of California, Berkeley.”

http://phenomena.nationalgeographic.com/2014/01/23/the-mantis-shrimp-sees-like-a-satellite/

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