In 1960 the Nobel Prize–winning physicist and mathematician Eugene Wigner wrote an article entitled "The Unreasonable Effectiveness of Mathematics in the Natural Sciences". He pointed out that "the enormous usefulness of mathematics in the natural sciences is something bordering on the mysterious and that there is no rational explanation for it."[6] In applying mathematics to understand the natural world, scientists often employ aesthetic criteria that seem far removed from science. Einstein once said that "the only physical theories that we are willing to accept are the beautiful ones."[7] Conversely, beauty can sometimes be misleading; Thomas Huxley wrote that "Science is organized common sense, where many a beautiful theory was killed by an ugly fact."[8]