Spoiler: Scientists haven't discovered life beyond Earth, not even a single teeny-tiny organism. But there's a whole lot of outer space, and humans have searched only a fraction of a fraction of it. So do you believe in the possibility of life out there? Or do you think Earth is perfectly unique in its ability to grow organisms? Packed with playful illustrations and fascinating factoids, 'Where Are the Aliens?' will take you on a journey of scientific theories and discoveries, from the big bang and primordial soup, to how the ancient Greeks considered the cosmos, to the technology used today to listen to and (possibly!) communicate with far-off exoplanets.