We Are Not Alone boldly argues that extraterrestrial life is astrobiological fact. Far from existing light-years away in the outer reaches of space, itżs on our very doorstep. For persuasive evidence of microbial life, we need look no further than our celestial neighbour, Mars. Expertly probing the latest scientific research, including from the Phoenix probe in 2008, this groundbreaking book provides compelling reasons to believe that extraterrestrial life is rife in the Solar System and beyond.