Drawing on his experience as part of a panel at the World Science Festival that discussed science and religion, Lawrence Krauss writes about the incompatibility between religion and science. In this Wall Street Journal editorial, Krauss says that "God is, of necessity, irrelevant in science" and cites the evolutionary biologist J.B.S. Haldane who said that scientific work cannot be undertaken if you think a "god, angel, or devil" will affect your work.