Could North Korea be behind commentator Alva Noë's car problems? Not likely. Just as it's not likely a theory of everything will ever explain human behavior. Ed Jones/AFP/Getty Images hide caption

itoggle caption Ed Jones/AFP/Getty Images

Is science more like a pyramid, or a sun-dappled patch of ground? Fayez Nureldine/AFP/Getty Images hide caption

itoggle caption Fayez Nureldine/AFP/Getty Images

Swarms of locusts in Madagascar, or clouds of elementary particles, without sound, odor, flavor or color? Reality is harder to pin down than you first might think. Bilal Tarabey/AFP/Getty Images hide caption

itoggle caption Bilal Tarabey/AFP/Getty Images