The only evidence of life that we are aware of is that which has evolved on our planet, but man continues to search outer space for signs of other life forms. From the time of the Viking Mission to Mars up until the recent research into Jupiter's satellites, science has been on a quest for answers. A new branch of science, astrobiology, is redefining and analysing life on Earth and in doing so is creating the basis on which scientists of the future will work. If life is fundamental to the workings of the universe then undoubtedly the answers await us out there.