A wildlife biologist who studied mountain goats and grizzlies in the Rockies, Doug Chadwick began writing about natural history and conservation for national magazines. On assignments from Siberia to the Congo River's headwaters, he has produced several hundred popular articles and ten books. He is also the vice chair of the board of Vital Ground, a nonprofit land trust that has helped safeguard more than 600,000 acres of wildlife habitat in Alaska, Canada, and the western US.