"[3] He was the editor and author of several books in popular sciences and theology covering urban air quality, cancer, environmental medicine, ethics, and photography.
He was a signatory[7] to the A Scientific Dissent From Darwinism statement issued in 2001 by the Discovery Institute, a conservative Christian think tank based in Seattle, Washington, US, best known for its advocacy of intelligent design.
The statement expresses skepticism about the ability of random mutations and natural selection to account for the complexity of life, and encourages careful examination of the evidence for "Darwinism", a term intelligent design proponents use to refer to evolution.
"[14] A review on the Studiengemeinschaft Wort und Wissen (Word and Knowledge Study Community) website, whose members take a literal approach to the Bible, stated that it contained such "serious substantive and methodological errors" that it could not be recommended while agreeing that the Exodus took place.
Peter van der Veen and Uwe Zerbst specifically criticized his identification of Jabal al-Lawz with Mount Sinai and a number of the geographical locations he thought to be part of the Exodus route.