The possibility of life on other worlds has long been the subject of endless speculation - and more and more, of scientific research. Our improving knowledge of the processes that might lead to the creation of life elsewhere is matched by the greater sophistication of our searches for some sign of intelligent life elsewhere in the universe.SETI - the search for extra-terrestrial intelligence is undergoing something of a re-birth, and alongside the work of the scientists almost a million PC users round the world are participating in the SERENDIP IV project through the "SETI at Home" initiative from Berkeley University in California.Life on Other Worlds and How to Find It is an up-to-date review of today's scientific thinking about where and how we might find life elsewhere in the universe, presented in Stuart Clark's easily read yet authoritative style.