The Foundation of Science Is Absolute Truth
Scientific knowledge is not a collection of subjective opinions. Rather, it is a collection of explanations about objective reality that is based on observed or predicted phenomena. In addition, the explanation must be verified repeatedly to confirm that it correctly models reality.
As our technical ability to observe reality improves, we are able to increase the quality and quantity of our observations. Better-observed data challenge our explanations, some of which will no longer fit the observed facts. New theories are then formed and either verified or falsified.
While our scientific knowledge changes rapidly, the absolute reality that is being modeled has never changed. The scientific method assumes an absolute reality against which theories can be verified.