If we are going to look closer to the elements of both, science and religion, we can observe that science is more connected to physical points and religion is more connected to insubstantial points. So, the essence of science can not be compared with the essence of religion as they are the opposite sides of one whole. In other words we can say that science answer on the question ‘How?’ and religion answers on the question ‘Why?’
But nowadays science tries to be general and not only to give the answers on ‘how’, but to be able to explain why and for what. Science also wants to comprehend the world as the religion did it. People want to see more then they see now and not always science can explain this. And only due to this fact science can not be as important as religion. Humans are so eager to know more and if science has no opportunities to propose the answers, humans turn to religion and satisfy their desire.
But nevertheless, the scientists do want to give for their work high rank and the same time right. But how much the desire was it can not be proved as there are not enough facts to make it real. So, the theory without necessary facts can not be correct and the facts for science can not be always demonstrated, but sometimes it can be proved to be false as a result for great number of researches.
There are a lot of persons who criticize the science. For example, Karl Popper proposed the theory according to which the facts to the scientific researches are only prospects and it need a lot of time in order to drop or to adjust the theory. Thomas Kuhn said that a lot of scientist just fit their experience to the already existed ones.