Across a Universe of at least 100 billion habitable, earth-like worlds, life cannot be restricted solely to the Earth. Or can it? Read this book to find out the hows and whys of astrobiology - the study of extraterrestrial life.

An expert romp through the science of extraterrestrial life. -- Adam Rutherford, scientist, writer and presenter of BBC Radio 4's Inside Out HIghly recommended ... * Financial Times * Louisa is that rare breed - a brilliant academic who can effortlessly communicate her subject with clarity, authority and warmth to us all. A fascinating overview of what is simply the most profound and exciting story in science. -- Dallas Campbell, science broadcaster and television presenter Extremely interesting ... I would strongly advise you to run off and buy a copy. * The Biologist * Just the right book to expertly guide you through the scientific quest to answer the ultimate question; are we along in the University? -- Lucie Green, space scientist, television presenter and author of 15 Million Degrees Our species has gone from fantasising about life on other worlds to actively looking for it - this book provides great background on clues scientists are using, and what makes the chase so exciting. -- Bobak Ferdowsi, Flight Director, Mars Science Laboratory

Louisa Preston is an astrobiologist, planetary geologist and unashamed lover of water bears. Her research focuses on places on Earth in which life is able to survive despite extreme conditions; such habitats provide clues on what alien life-forms might look like, and where we should search for them. Having worked on projects for NASA and the Canadian, European and UK Space Agencies, the only thing Louisa enjoys more than devising ways to find extra-terrestrial life is writing and talking about it. She has published numerous articles and academic papers, and regularly appears on radio and television shows, such as the BBC's The Sky at Night. She is a TED fellow, and spoke about the search for life on Mars at the 2013 TED Conference. Louisa has spent most of her life in one of two Londons - one in Ontario, and one in the UK - but she currently lives with husband, son and cat in Kent. Goldilocks and the Water Bears is her first book. @LouisaJPreston

Preface 1. A Brave New World 2. Life As We Know It 3. How to Create a Planet Fit for Life 4. The Story of Life 5. Alien Worlds on Our Doorstep 6. Everything is Relative! 7. Searching the Solar System 8. Extraterrestrial Worlds: Life Not As We Know It 9. Is the Truth Really Out There? 10. The Next Generation Epilogue Acknowledgements Index