From a Math Puzzle to an Odd Moon

Asked for an odd moon, my friend Bob thought of Keith Moon, a witty but incorrect answer. If you hated age-problems in high school algebra, you have plenty of company. I've even heard teachers complain that they are contrived instruments of torture. (I think they are merely tired of teaching a curriculum over which they... Continue Reading →

Why Are Some Still Using Methylene Chloride to Extract Caffeine?

Methylene chloride, also known as dichloromethane, is a solvent that, compared to water, can do a better job at dissolving certain substances such as grease, paint and caffeine. The so-called non polar solvent is mass-produced. It's used by the fracking and plastic industry and in the production of HFC-32, a widely used replacement for CFCs... Continue Reading →

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