The sweeping diversity of complex life on Earth Ward and Brownlee argue evolved out of an
extraordinary set of physical conditions and chance events that would be extremely hard to
duplicate - though not impossible. Many planets throughout the vastness of the Universe may be
teeming with microbial life but advancement beyond this stage is very rare. Everyone with an
interest in the possible extent of life in the Universe and the nature of life's evolution on
our own planet will be fascinated by RARE EARTH.
