F. Harvey Pough began his biological career at the age of fourteen when he conducted his first research project on the ecology of turtles in Rhode Island. His research now focuses on organismal biology, blending physiology, morphology, behavior, and ecology in an evolutionary context. He especially enjoys teaching undergraduates and has taught courses in vertebrate zoology, functional ecology, herpetology, and the ecology, environmental physiology, and the biology of humans. After 23 years at Cornell University, he moved to Arizona State University West as Chair of the Department of Life Sciences to focus on the challenges of teaching undergraduates at a university that emphasizes community involvement. When not slaving over a hot computer revising Vertebrate Life, he enjoys walking in the desert with his Labrador retriever, Martha.

Christine M. Janis is a Professor of Biology at Brown University where she teaches comparative anatomy and vertebrate evolution. She obtained her bachelor's degree at Cambridge University and then crossed the pond to get her Ph.D. at Harvard University. She is a vertebrate paleontologist with a particular interest in mammalian evolution (especially hoofed mammals) and faunal responses to climatic change. She first became interested in vertebrate evolution after seeing the movie Fantasia at the impressionable age of seven. That critical year was also the year that she began riding lessons, and she has owned at least one horse since the age of 12. She is still an active rider, although no longer as aggressive a competitor (she used to do combined training events). She attributes her lifestyle to the fact that she has failed to outgrow either the dinosaur phase or the horse phase.

John B. Heiser was born and raised in Indiana and completed his undergraduate degree in biology at Purdue University. He earned his Ph.D. in ichthyology from Cornell University for studies of the behavior, evolution and ecology of coral reef fishes, research which he continues today. For fifteen years he was Director of the Shoals Marine Laboratory operated by Cornell University and the University of New Hampshire on the Isles of Shoals in the Gulf of Maine. While at the Isles of Shoals his research interests focused on opposite ends of the vertebrate spectrum―hagfish and baleen whales. J.B. enjoys teaching vertebrate morphology, evolution, and ecology both in the campus classroom and in the field and is recipient of the Clark Distinguished Teaching Award from Cornell University. His hobbies are natural history, travel and nature photography and videography, especially underwater scuba. He has pursued his natural history interests on every continent and all the world's major ocean regions. Because of his experience he is a popular ecotourism leader having led Cornell Adult University groups to the Caribbean, Sea of Cortez, French Polynesia, Central America, the Amazon, Bornea, Antarctica, and Spitsbergen in the High Arctic.