David O NorrisDr. David Norris is Professor Emeritus at the University of Colorado. He obtained his BS from the Baldwin-Wallace University and his PhD from the University of Washington. His broad research areas include environmental endocrinology and forensic botay. In the area of environmental endocrinology, his studies have focused on the neuroendocrine control of thyroid, adrenal, and reproductive functions with special interest in the role of environmental factors that alter the activities of these neuroendocrine systems. In the area of forensic botany, he specializes in the identification of food plants in stomachs of modern humans with respect to determining time of death. Read More Read Less