Tui de Roy is a naturalist, an expert on Galapagos and the world's preeminent Galapagos photographer. She is the author and photographer of New Zealand, The Andes and Albatross. She lives in New Zealand.

Sarah Darwin is a botanist and descendant of Charles Darwin. She lives in the United Kingdom.

Contributing writers include: Dennis Geist, volcanologist, University of Idaho; Julian Sachs, paleoclimatologist, University of Washington; Conley K. McMullen, botanist, James Madison University, Virginia; Jack S. Grove, naturalist and research associate, Section of Ichthyology, Natural History Museum of Los Angeles County; Alex Hearn, adjunct marine biologist, University of California- Davis; Martin Wikelski and Michael Romero, physiological ecologists, Max Planck Institute, Germany, and Tufts University, Massachusetts; Peter and Rosemary Grant, evolutionary biologists, Princeton University, New Jersey; Patricia Parker, disease ecologist, WildCare institute, Saint Louis Zoo, Missouri; David Anderson, evolutionary biologist, Wake Forest University, North Carolina; Kathryn Huyvaert, ecologist, Colorado State University; Karl Campbell, Island Conservation, California; Godfrey Merlen, naturalist and independent researcher, WildAid, Galapagos, Ecuador.