The east coast of the U.S. has been experiencing a punishing heat wave over the past week, with cities like Washington D.C. hitting 100 degrees and breaking all kinds of heat-related records.
Scientific knowledge is ever-evolving and, ideally, self-correcting. Few fields demonstrate that better than the world of nutrition science. In the past, for instance, diet gurus and researchers have made declarations about the ills of having anything more than a little fat, no matter the kind; same with cholesterol.…