A thoughtful, clear and utterly fascinating reference, this book is absolutely vital to writers who want to put extraterrestrial life-forms in their novels and

Are alien civilizations really possible? If extraterrestrials exist, where are they? How likely is it that somewhere in the universe an Earth-like planet suppor

Astronomers around the world are pointing their telescopes toward the heavens, searching for signs of intelligent life. If they make contact with an advanced al

THE FIRST IN AN ALL NEW, OFFICIAL TRILOGY SET IN THE ALIEN UNIVERSE! Featuring the iconic Ellen Ripley in a terrifying new adventure that bridges the gap betwee

Addressing a field that has been dominated by astronomers, physicists, engineers, and computer scientists, the contributors to this collection raise questions t