Patricia O’Neil: “I know that this week’s news has been dominated by Brexit and the horror in Istanbul, but a report on NPR piqued my interest. Evidently this poor microscopic algae has been living in northern streams for years and we didn’t even know it was there. Now because of global warming, it’s been multiplying like crazy. When it multiplies, it forms a mat-like substance that covers stream beds and rocks and looks for all the world like the snot of some prehistoric creature. Hence the name rock snot. It seemed to be crying out for a Seussian defense.”