Grand Canyon: A Different View features essays by  which American biochemist and a prominent member of the creationist movement?
Duane Gish Duane Tolbert Gish (February 17, 1921 – March 5, 2013) was an American biochemist and a prominent member of the creationist movement. A Young Earth creationist, Gish was a former vice-president of the Institute for Creation Research (ICR) and the author of numerous publications about creation science. Gish was called "creationism's T. H. Huxley" for the way he "relished the confrontations" of formal debates with prominent evolutionary biologists, usually held on university campuses. A creationist publication noted in his obituary that "it was perhaps his personal presentation that carried the day. In short, the audiences liked him."
Richard L. Hay (geologist) Richard LeRoy Hay (April 29, 1929 – February 10, 2006) was an American geologist whose most famous work was as the principal geologist working with Mary Leakey at Olduvai Gorge., the site of many important hominid finds in the study of human evolution. His scientific impacts went much further, however, including fundamental contributions to our understanding of the interactions of water, minerals, and organisms near the Earth's surface. He held the position of Professor of Geology at the University of California, Berkeley for 26 years (1957-1983) and at the University of Illinois for another 11.