This stunning volume features cutting-edge, digital imagery showing what twenty-first-century scientists are finding out about the possibilities of alien life. Weighing scientific principles against science fiction, Aliens: Are We Alone? takes readers on a fascinating journey through time and space. The book draws closely on the visual material designed specifically for a landmark exhibition at London's Science Museum along with additional illustrations and photographs. Jack Challoner examines alien stereotypes throughout history, exposing their historical and mythical precedents. He explains how modern scientists are exploring the possibilities of alien life, searching for clues in the extreme climates of our planet to understand how a species might thrive in the atmospheres of other planets and galaxies. Drawing on sound scientific principles, the book reveals how scientists imagine what aliens might be like. A thrilling, mind-bending experience for readers of all ages, Aliens demonstrates how humankind is limited only by its own imagination and experience.