>sometimes we use science to justify intolerance, and time and again the science has caught up with what people have reported as their own life experience.
bennetfeely in a cousin post has a good Wikipedia link on it. At different times in history racism has been justified by religious and (then current) scientific thinking on biology and (possibly) evolution. It's been used to justify slavery and genocide or the general subjugation of nations of people.
Do you have any examples of this?