>> I'd like to start collecting concrete examples of ways in which we live
>> differently because we know specific things about the world - things learned
>> through science. In other words, what are some concepts or pieces of
>> knowledge for which you would say, "I make different choices, act
>> differently because I know ---- ."

Elaborating on previous comments, I'd say that the insights from medical science have had the most direct influence on people's behavior. Sara pointed this out with her example about nutrition. On a daily basis, we exercise, wash our hands, watch what we eat, take certain medicines, etc. because medical science suggests that this is good for us. I think this is why the "science" sections in newspapers are so often dominated by findings from medical research. The editors know that this is information that people can and will directly use. (Extricating the philosophical implications of scientific findings is also very important, but it's harder and less familiar.)

In recent e-mails, we've focused on the effects of the concept of "survival of the fittest," but there are other ideas from evolution that can influence our thoughts and behaviors. Knowing about evolution has made me more respectful and protective of other life forms because I realize that we have similar origins. It has also made me more willing to incorporate experimentation in my life, since I see what a major role experimentation has played in nature.

Amanda