David O. 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 botany. In the area of environmental endocrinology, his studies have focused on the neuroendocrine control of thyroid, adrenal, and reproductive functions with special interest ... Read morein 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 the stomachs of modern humans with respect to determining time of death. Kristin H. Lopez obtained her MA and PhD at the University of Colorado Boulder. Her research interests include morphological and physiological aspects of vertebrate reproduction and development, especially sex differentiation and ovarian function in reptiles and amphibians. She has enthusiastically supported the development of young scientists through teaching, textbook development, outreach, and programs to increase diverse representation in STEM. Show Less