With a uniquely diverse living outdoor laboratory, Yellowstone National Park offers researchers and scientists from around the world an opportunity to study a wide range of subjects throughout the Greater Yellowstone Ecosystem, one of the largest intact temperate zone ecosystems in the world. This 48-page book helps young readers learn about research - past and present - in this unique natural laboratory. The Natural Laboratory: Scientists in National Parks series takes a look at the research and responsibilities of scientists working in U.S. national parks. Each 7.5 x 10 photo-filled book explores the topography of the park, its natural resources, the specific projects that have been undertaken there and why these projects are significant. Each 48-page book in the series also features quotes from scientists working in the featured park, to better explain to readers how and why things are done.