Science, honest science is the study of the mechanisms that exist in the universe.  The dictionary definition: "knowledge or a system of knowledge covering general truths or the operation of general laws especially as obtained and tested through scientific method" is a good description of what a scientist does.  This is what they do.  From a scientific point of view nothing is paranormal, supernatural, spritual.  Things either have evidence to support them or they don't.  When two or more ideas that all have evience supporting them exist, the one that has the most convincing evidence is the one that 'wins'.

    A surprising misconception about science is the definition of the word "theory".  In common language a theory is not treated as a very secure truth.  It is usually an idea that fits the known facts.  In very basic terms, this is what a scientific theory is, but it is much more substantial than "just a theory"  But don't take my word for it.  Here is a more in-depth explanation from an actual scientist, Dave Esker

    If there is anything analogous to "gospel" in the scientific world that it can be said that scientists have "faith" in, it would be the scientific method, which governs the rule that scientists should use to learn things that we don't currently know, but even that is an unfair comparison because the scientific method has a proven track record.  All of our currently accepted scientific knowledge and the technology we derive from it came about by using the scientific method, so it is not fair to say that scientists have "faith" in the scientific method.  They don't have to.  It proves itself almost daily in the discoveries we make because of it.