Editor's Note: This article is the first in a special LiveScience series about the theory of evolution and a competing idea called intelligent design. TODAY: An overview of the increasingly heated exchange between scientists and the proponents of intelligent design. COMING FRIDAY : Proponents argue that intelligent design is a legitimate scientific theory, but a close look at their arguments shows that it doesn't pass scientific muster. Science can sometimes be a devil's bargain: a discovery is made, some new aspect of nature is revealed, but the knowledge gained can cause mental anguish if it contradicts a deeply cherished belief...