micro(n)kinesis

" Today, as genetics underlies all modern biology, it is astonishing that a small change in one’s DNA dramatically alters one’s perception of the world. The most profound question is why the genes for synesthesia remain so prevalent in the general population. Remember that about one in 30 people walk around with a mutation for an inwardly pleasant but apparently useless trait. It costs too much in wasted energy to hang on to superfluous biology, so evolution should have jettisoned synesthesia long ago. The fact that it didn’t means that it must be doing something of inapparently high value.