Naturalistic science reflects the modern philosophical understanding of science. Evolution of the universe and of life is the only acceptable model of origins. A naturalistic science only gained broad acceptance a little over a century ago. The leading scientists who laid down the foundations of our modern science, such as Robert Boyle, Blaise Pascal, Carl von Linne, and Sir Isaac Newton, were much more like creation scientists than naturalistic scientists. Creation science posits that there is a God who is the Creator, and the Bible is His word.
Nature is interpreted in the context of that basic philosophical stance.
Creation is not considered to be a science, because creationists are starting with the conclusions of creation. On the other hand, it is not at all clear that evolutionists don't start with an evolutionary agenda as they interpret nature. I would like to suggest a third type of science, which for lack of a better term will be called methodological science . This science focuses on science as a method of finding what nature is saying. As such it is free of the restrictions of either naturalistic or creation science.