Thinking about Life

Our previous book, About Life, concerned modern biology. We used our present-day understanding of cells to define the living state, providing a basis for exploring several general-interest topics: the origin of life, extraterrestrial life, intelligence, and the possibility that humans are unique. The ideas we proposed in About Life were intended as starting-points for debate we did not claim them as truth but the information on which they were based is currently accepted as scientific fact. What does that mean? What is scientific fact and why is it accepted? What is science and is biology like other sciences such as physics (except in subject m- ter)? The book you are now reading investigates these questions and some related ones. Like About Life, it may particularly interest a reader who wishes to change career to biology and its related subdisciplines. In line with a recommendation by the British Association for the Advancement of Science that the public should be given fuller information about the nature of science we present the concepts underpinning biology and a survey of its historical and philosophical basis.