This husband and wife team have written numerous articles and books about volcanoes, and about nature in the National Parks of the USA. Barbara Decker is a science writer specializing in natural history who has witnessed some of the most spectacular volcanic activity to have occurred in recent years. Robert Decker was the world authority on volcanoes who for 25 years taught geophysics at Dartmouth College. Subsequently he was Scientist-in-Charge of the Hawaiian Volcano Observatory for five years. He studied volcanoes in Indonesia, Iceland, Central and South America, and the United States. He passed away in 2005.