"Believe" in science? People believe in the scientific method, and in the idea that "truth" is an approximation. I suppose what we are really saying is that you can't have the absolute certainty that the religious mind seems to crave. Giving them their due, people of mature religious belief accept that uncertainty too, even about their religion. You are unfortunate in the USA in having as the mainstream faith one which is philosophically stuck in the 17th century.