Quote Originally Posted by Eric View Post
Could there be xmen type folks who can see more colors in telescopes than the rest of us? The http://www.digitaljournal.com/article/326976 article says at least one person has been found that can see extra colors.
Sure.

I already knew that tetrachromacy was moderately common in women and not known to exist in men. I didn't know that it's rare for a person with 4 cones to have the "extra" cones be active.

As I understand it, the extra cone is between green and red, and wouldn't allow the person to see infrared or ultraviolet.