OPB: It's not in your head. Seattle`s Lake Washington is getting warmer and more comfortable to swim in every year. And it's not the only lake experiencing a rapid rise in temperature. For the first time, scientists have brought together a comprehensive data set from 235 lakes around the world, containing more than half of the world's fresh water. The study, which was published in the journal Geophysical Research Letters, found that globally, lake temperatures are rising more rapidly than ocean or air...