Janet L. Hopson is a full-time science writer who has written or co-authored nine books, including two popular nonfiction books on human pheromones and human brain development, and six textbooks on general biology for college and high school students. She teaches science writing at San Francisco State University and University of California Santa Cruz. She holds BA and MA degrees from Southern Illinois University and the University of Missouri. Hopson has won awards for magazine writing, and her articles have appeared in Smithsonian, Psychology Today, Science Digest, Science News, Outside, and others.

Dr. Rebecca J. Donatelle is an Emeritus Associate Professor of Health Promotion and Behavior Coordinator of the Public Health Promotion and Education Programs in the College of Health and Human Sciences at Oregon State University. She has a PhD in Community Health/Health Education, a Master of Science degree in Health Education, and a Bachelor of Science degree with majors in both Health/Physical Education and English. She is also a Certified Health Education Specialist. She teaches courses in Health Behaviors, Infectious Diseases, Chronic Disease Prevention and Control, and Violence and Public Health, and has taught thousands of students in health-related fields over the years. As a researcher and behavioral scientist with an emphasis on intervention science, much of her work has focused on women’s health and the health of elderly populations. Her research has been published in numerous journals, and she has been a guest speaker and presenter at professional conferences throughout the country. Donatelle is also the author of the highly successful introductory health textbooks Access to Health and Health: The Basics, published by Benjamin Cummings.

Dr. Tanya R. Littrell is a full-time faculty member in Fitness Technology and Physical Education at Portland Community College in Portland, Oregon. Littrell worked as a fitness director for many years before attending graduate school at Oregon State University, where she earned both a master’s degree in Human Performance/Exercise Physiology and a doctoral degree in Exercise Science/Exercise Physiology. Littrell has been teaching lifetime fitness classes for undergraduates since 1998.

Janet L. Hopson is a full-time science writer who has written or co-authored nine books, including two popular nonfiction books on human pheromones and human brain development, and six textbooks on general biology for college and high school students. She teaches science writing at San Francisco State University and University of California Santa Cruz. She holds BA and MA degrees from Southern Illinois University and the University of Missouri. Hopson has won awards for magazine writing, and her articles have appeared in Smithsonian, Psychology Today, Science Digest, Science News, Outside, and others.

Dr. Rebecca J. Donatelle is an Emeritus Associate Professor of Health Promotion and Behavior Coordinator of the Public Health Promotion and Education Programs in the College of Health and Human Sciences at Oregon State University. She has a PhD in Community Health/Health Education, a Master of Science degree in Health Education, and a Bachelor of Science degree with majors in both Health/Physical Education and English. She is also a Certified Health Education Specialist. She teaches courses in Health Behaviors, Infectious Diseases, Chronic Disease Prevention and Control, and Violence and Public Health, and has taught thousands of students in health-related fields over the years. As a researcher and behavioral scientist with an emphasis on intervention science, much of her work has focused on women’s health and the health of elderly populations. Her research has been published in numerous journals, and she has been a guest speaker and presenter at professional conferences throughout the country. Donatelle is also the author of the highly successful introductory health textbooks Access to Health and Health: The Basics, published by Benjamin Cummings.

Dr. Tanya R. Littrell is a full-time faculty member in Fitness Technology and Physical Education at Portland Community College in Portland, Oregon. Littrell worked as a fitness director for many years before attending graduate school at Oregon State University, where she earned both a master’s degree in Human Performance/Exercise Physiology and a doctoral degree in Exercise Science/Exercise Physiology. Littrell has been teaching lifetime fitness classes for undergraduates since 1998.