Joel R. Primack, Ph.D., is an award-winning professor of physics at the University of California, Santa Cruz, and is one of the most respected researchers in his field. He was one of the principal originators and developers of the theory of Cold Dark Matter, and is a Fellow of the American Physical Society. Nancy Ellen Abrams is an award-winning science philosopher, a writer, an artist, and a lawyer whose work has appeared in journals, magazines, and books.