For skeptics, always fans of science: The first two books in aseries devoted to "bad science," Bad Astronomy by PhilipPlait and Bad Medicine (Wiley, $15.95) by ChristopherWanjek, may warm even a Scrooge's heart. In short chapters, Plaittackles misperceptions about why the moon looks larger on thehorizon and why stars twinkle before moving on, dismantlingconspiracy kooks who doubt the moon landing and offering a top 10list of bad science moments in movie history. Wanjek, a sciencewriter who has also written jokes for The Tonight Show andSaturday Night Live, takes an edgy and funny tack indebunking myths such as humans using only 10% of their brains, theutility of "anti-bacterial" toys and the safety of "natural" herbalremedies, ones often loaded with powerful chemicals. (USATODAY, December 3, 2002) "...Bad Medicine is an enjoyable romp through a host ofbiomedical misconceptions..." (New Scientist, 21 December 2002) "...Wanjek shoots and scores when he tackles the major myths ofmedicine..." (Focus, February 2003)