The 1996 Humanist of the Year asked this question in a speech accepting the honor from the American Humanist Association. Faith, being belief that isn't based on evidence, is the principal vice of any religion. Well, science is not religion and it doesn't just come down to faith. Although it has many of religion's virtues, it has none of its vices.
Science is based upon verifiable evidence.
Religious faith not only lacks evidence, its independence from evidence is its pride and joy, shouted from the rooftops. The other apostles are held up to us as exemplars of virtue because faith was enough for them. Doubting Thomas, on the other hand, required evidence. Perhaps he should be the patron saint of scientists. One reason I receive the comment about science being a religion is because I believe in the fact of evolution.