Bi-Weekly Biosolids Newsclips
"Petrichor." This is your "word-of-the-day," which i just learned myself this morning when I joined an early morning running group that includes an organic chemist. We were assembled at an unseasonably cold 37 degrees as a light rain started; a distinctive fragrance wafted by, and my running buddy says, "that is petrichor!" Like "biosolids," petrichor is a relatively new word, coined in 1964 by Australian chemists out of ancient Greek "petro" for rock and "ichor" for ethereal blood of the Gods. Petrichor is that distinctive scent that precedes a rain storm, arising from the release from clay minerals of a volatile oil when humidity suddenly rises and rain drops disperse aerosols. Unlike the release of the dimethyldisulfide from fresh biosolids, to which humans seem genetically predisposed to find repugnant, the petrichor emitted from clay elicits positive emotions in humans and animals. I know, it is not fair! On to the news!