Life Everywhere

To many people, the main question about extraterrestrial life is whether or not it exists. But to the scientific community, that question has already been answered: It does. So confident are scientists of the existence of life on other planets that they've invested serious amounts of money, time and prestige in finding and studying it. NASA has started an Institute of Astrobiology, for instance, and the University of Washington, Seattle, began in September 1999 to accept graduate students i...