The Search for Life on Mars
Author: Helen Sillett People have wondered about Mars for thousands of years. Mars is one of our closest neighbors in space, but it is a very mysterious place. In the past, many people imagined that there were living things on Mars. Others said that Mars was a dead planet. Has there ever been life on Mars? Is there life on Mars today? Spacecraft and telescopes are giving us new ways to answer these questions. In this book, you will find out how our ideas about Mars have changed as scientists have learned more and more about this mysterious planet. 
 Produced in cooperation with the NASA/Caltech-Jet Propulsion Laboratory Education Office, Mars Public Engagement, NASA-Mars Exploration Program scientists and engineers.Read More in the September '06 Press Release
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