No scientist has yet proven that there is no God. That is partly because a scientist must always keep an open mind. There might be life on the the Jovian moon Europa. Presently, we just don't know. Some scientist think there are. Theories like medical theory of the four bodily humours have been disproven, and we now know are obviously false. But that theory was still used as late as the 1850's. Other theories like some of Newton's are now understood to be partly true, partly false. There might be life on Europa. The Moon "might" be made of green cheese. Perhaps because the same chemicals like hydrogen and ammonia that led to life on earth 4 billion years ago created milk, and then cheese. We just don't know. Some scientists are still skeptical. Richard Dawkins says there might be elves in his garden. But he doubts it. Other scientists like Carl Sagan were more hopeful. Though Sagan never made it clear what his beliefs were. Einstein, was of course, a pantheist. Sagan himself pointed out that how God is defined is important. If you mean the set of physical laws that govern the universe, then clearly there is a God, he once said. The Judeo-Christian Bible is utter nonsense. It says the world is flat and was was created 6,000 years ago. Yes it does, yes it does, yes it does. Just look up the word firmament (Hebrew: רָקִ֫יעַ). No I won't help you, look it up yourself. (It also says things like a man's semen contains his "seed" or literally, a fully-formed baby, Gen. 38: 9.) As I said, Einstein was a pantheist. Sagan never made it clear what he was. But he did always feel a kinship with the Judeo-Christian Bible, which is ironic with what I just said above. Because he was raised a Reformed Jew. And he would always have that hope in his heart.