Get It in Writing John D. MacArthur is a science and history writer who enjoys the challenge of integrating information and ideas into compelling narratives that promote personal and planetary health. John is best known for his expertise on the history and significance of the Great Seal of the United States. His 76-page website GreatSeal.com has become a popular and respected source of accurate information about America's official emblem. A top Google search result, the site now averages about 2,000 visits a day. In-Depth Reports Don't Be Takin' Fluoride     (Wild Juniper Journal, Sierra Club, Summer 2008) This report uses federal and state government data as a reality check to deconstruct the sales pitch for water fluoridation – revealing its ineffectiveness at reducing tooth decay. Includes five charts comparing states' fluoridation status and disease rates. Cell Phones and the Brain – How Electricity Affects Biology     (Townsend Letter for Doctors and Patients, July 2002) Evidence is reviewed here that shows how electromagnetic fields are known to interact with biological processes: by increasing free radicals; by activating the stress response; and by altering enzyme reactions. Understanding the electrical nature of the brain will provide insights into the possible cognitive consequences of the radiofrequency radiation used in wireless communication. The Trouble with Tofu – Soy and the Brain     (Wise Traditions, Fall 2000) "Tofu Shrinks Brain!" Not a science fiction scenario, this sobering soybean revelation is for real. But how did the "poster bean" of the '90s go wrong? Apparently, in many ways – none of which bode well for the brain. See also "The Human Brain," a comprehensive 70,000-word section written for the Franklin Institute Science Museum about how to nourish, exercise, protect, and rest your brain. Contact John