NPR hat einen schönen Artikel inklusive Podcast und Animation über das bekannte Phänomen, dass Menschen nicht wirklich gradeaus laufen können und es dafür bislang tatsächlich noch keine Erklärung gibt.
So why, when blindfolded, can’t we walk straight? There is still no good answer. Jan Souman, a research scientist in Germany, co-wrote a paper last year about this human tendency to walk in circles…
In our radio broadcast, Jan and I explore possible explanations for this tendency to slip into turns. Maybe, I suggest, this is a form of left or right handedness where one side dominates the other? Or maybe this is a reflection of our left and right brains spitting out different levels of dopamine? Or maybe it’s stupidly simple: Most of us have slightly different sized legs or slightly stronger appendages on one side and this little difference, over enough steps, mounts up?
Wrong, wrong and wrong, Jan says. He’s tested all three propositions (the radio story describes the details) and didn’t get the predicted results.