Just a quick (but interesting) one this evening. READ HERE. Some women possess 4 cones in their eyes, enabling them to see about 99 times more colours than most women and all men. So colours like mauve actually exist! :)
What I found cool was that the ability is latent in a lot of women, but could be trainable. Alas, I may never get to see 99 million colours, but it must be pretty cool.. I have seen some interesting ideas about training the eyes and visual perception, which I will write about another time (part of the sensory enhancement aspect of Physical Alchemy).