All those interested in scientific progress should read this:
"Anyone involved in biomedical research knows that scientific “facts” that remain untouched by the ravages of further research are a rare commodity. Usually, most facts change their form with time (evolve), and their meaning, and probably their importance, also will change. Disappointing as this may be for our scientific egos, it represents something far more important—scientific progress. It is inevitable that scientific progress, in the form of new facts, will trample over our bright ideas, hypotheses, and even over our results. This apparently destructive process is in fact constructive, and as scientists, we have to embrace this evolution and to accept that the sacrifice of our initial beliefs (and our precious results and our interpretations) is part and parcel of advancing understanding."
-- Richard M. Sharpe
Is It Time to End Concerns over the Estrogenic Effects of Bisphenol A?
Toxicol. Sci. 2010 114: 1-4.