Famed web comic xkcd—which describes itself as "a webcomic of romance, sarcasm, math, and language"—has made millions of fans for its smart, poignant, inventive humor that sometimes cuts and sometimes inspires, but nearly always reveals a ruthlessly keen mind. Today's web comic, "Click and Drag," is a truly mind-expanding experience, one that takes the idea of "clicking-and-dragging" to unheard of levels and awakens a spirit of exploration in you without having you ever leave your seat or even wait for a video to load. Do not click unless you have absolutely nothing else to do today ...