A definitive biography traces the life of John Muir from his boyhood in Scotland up to his death on the eve of World War I and offers important insights into the passionate nature of America's first great conservationist and founder of the Sierra Club.

Often called the mother of the modern environmental movement, Rachel Carson rocked the world in 1962 with her book Silent Spring, which warned the American public of the impact of pesticides on the environment and unleashed an extraordinary national debate about science and safety. At the center of that firestorm stood Ms. Carson, a strong, intensely private woman who balanced her love of the natural world and passion for writing with personal strife....

In the exploding world of citizen science, hundreds of thousands of volunteers are monitoring climate change, tracking bird migration, and following their bliss counting stardust for NASA or excavating mastodons. The sheer number of citizen scientists, combined with new technology, has begun to shape how research is conducted. Non-professionals become acknowledged experts: dentists turn into astronomers and accountants into botanists. Diary of a Citizen...