When the pediatrician diagnosed both of my two sons with color deficiency, I learned that they see the world a little differently than I do. They see colors, but they have difficulty differentiating between particular shades of reds and greens or blues and yellows. I’m not even sure which. If they had total color deficiency — color blindness — I would have worried, but as it was, we laughed about their little vision condition. It did not seem like any big loss that their career options might be slightly limited, given the wide realm of possibilities.

So when I first read the news last week that scientists had cured spider monkeys of red-green color deficiency, I thought it was a pretty minor stuff. Big deal, so monkeys can now see more colors than my kids! But… More…