The Uncooped blog, which shows more promise with each new post, points to the time-honored human habit of going in circles, which results from one leg being slightly stronger than the other. The post links to an English-language summary of a study pointing out that most people are are stronger on their right side and instinctively turn to their left, which we see everywhere from the walking paths at your city park to the “go fast and turn left” ethos of the Indy 500. I liked this elemental theory for why this may be:

The basic driver behind this phenomenon seems to be the fact that all cells in nature are composed of amino acids which have a left spin. Chemists can manufacture amino acids with a right spin, yet we can’t use them. Apparently both types of amino acids existed in the primordial soup at the beginning of life hundreds of million years ago. Yet life developed only from those with a left spin. The favorite theory is that at that time – when the earth did not yet have the protective ozone shield – radioactive rays from the cosmos did more harm to the amino acids with a right spin. Yet why those with a left spin would be more protected – if at all – is still a mystery.

And yet all of us left-handed types are clearly so more highly evolved….