13 July 2007
Vol 317, Issue 5835

About The Cover

Cover image expansion

COVER Changes in the intensity and distribution of future rainfall may have a substantial effect on human activities. As Earth warms, climate models predict that global rainfall will increase, but by a small amount. In contrast, satellite observations during the past two decades suggest that the increase in future rain may be much larger than previously expected. See page 233. Photo: Morey Milbradt/Brand X/Corbis