Scientists agree that the earth has become hotter over the last century. But on the causes, despite what looks to the public mind like a consensus, there are dissenting voices. Based on Henrik Svensmark's research at the Danish National Space Center, this book outlines a brilliant and daring new theory that has already provoked fresh thinking on global warming. As prize-winning science writer Nigel Calder and Svensmark himself explain, an interplay of the sun and cosmic rays - sub-atomic particles from exploded stars - seem to have more effect on the climate than man-made carbon dioxide. For anyone interested in the real science behind our climate, this book is a must-read.