This question is wrongly worded. Science is a discipline therefore it can't have beliefs/ You probably meant scientists. It is people who have beliefs not professions or disciplines. Again, scientists is too loose a consideration. Some undoubtedly believe in God and have proclaimed such. Many others do not.
I think perhaps the question in your mind is more like this: what scientific discoveries suggest there is (or is not) a god? That in itself is a huge question, and borders onto the discipline of Philosophy. There is no one answer. You must read the scientists and philosophers who consider the matter, Bacon, Galileo, Curie, Darwin, for instance.
Science cannot believe in anything, only scientists. There will be a variety of views amongst scientists as they may come from one of very many countries. Some key scientists have been religious. Although there may be a general tendency for scientists to be non-believers, famous scientists such as Carl Sagan and Einstein have pointed out that science and religion are not necessarily contradictory.
Basically, this is because we cannot prove the existence or non-existence of God or any god. Without such evidence, belief cannot be removed. It is actually a scientific statement to say that we live in a state of uncertainty. The scientific method, after all, depends on obtaining accurate evidence from direct observations.