Scientists have delved deep into the smallest particles of matter and have extended their view to the far reaches of the universe, but still they are unable to predict the temperature five days hence. In this intriguing book, two experts in meteorology and astronomy take us on a grand tour of Earth's weather. Amid colorful anecdotes of the Galpagos, Siberia, and places closer to home, they describe the factors involved in shaping our weather, from humidity and prevailing winds to air-pressure systems and the causes of seasonal change. They also explore the history of Earth's climate and its pivotal role in the development of life and human evolution. The authors end with a discussion of the major threats to Earth's atmosphere brought on by human activity, including global warming and ozone depletion, and argue that pure science-not politics-should dictate our policy responses.