A principal investigator for the NASA Astrobiology Institute, which funds a program to study "life as we do not know it"—investigating the possibility of life on other planets or, more controversial, creating non-DNA life in the laboratory—Peter Ward presents the latest data on the range of life that are scientifically possible on Earth and beyond. Authoritative and eye opening, Life as We Do Not Know It is sure to provoke wonder and heated debate among both professional researchers and lay readers alike.