A hard scientific concept to explain light It knows the fastest route ahead of time and bends as it transitions, veers course joyously following some cosmic efficiency depending on the medium in which it finds itself I throw the stick far down the creek thinking to guide Lexi into a long swim with natural instinct she trots lengthwise down the watery beach and, in happenstance, selects the most efficient entrance to dive into the deep Then there were those long minutes she spent at the edge of the pool Determinedly awaiting the stick to drift to her