Water is H2O. When you add CO2 it produces carbonic acid, which accounts for seltzer's taste. At first I thought that made it something other than water, because it's not simply H2O anymore. But by that logic flavored water isn't water either. So what do you think?
Dan Boyce from Montana Public Radio calls in to recommend a novel way to prepare a peanut butter and honey sandwich, plus a caller in Ottawa extols the virtues of day-old popcorn, and a woman who lives in China offers a semantic rant about macaroons and macarons. Photo: Flickr CC / ladylinoleum