Is belief in the existence of God irrational? These days, many famous scientists are also strong proponents of atheism. However, in the past, and even today, many scientists believe that God exists and is responsible for what we see in nature. This is a small sampling of scientists who contributed to the development of modern science while believing in God. Although many people believe in a "God of the gaps", these scientists, and still others alive today, believe because of the evidence.