Uh....just a second here. Are you actually saying that ALL science is based on fact? Cause I've seen a helluva lot of science that's based on mere THEORY. Like global warming, for instance. For every scientist that claims global warming is a fact, there's another that claims it's not a fact and has not been proven (ergo, is a theory). A lot of science (for instance, re: deep space) is based on theory, not fact.
"Science is based on fact..."
"Cause I've seen a helluva lot of science that's based on mere THEORY."
Theory is the highest level that science attains. Facts are data points that support of go against theories. Saying something in science is "only a theory" is only derogatory if you don't know what you're talking about.