How did life begin? It is perhaps the most important question science has ever asked. Over the centuries, the search for an answer has been entwined with some of science's most revolutionary advances including van Leeuwenhoek's microscope, Darwin's theory of evolution, and Crick and Watson's unveiling of DNA. Now, in an age of genetic engineering and space exploration, some scientists believe they are on the verge of creating life from nonliving elements...