Features a database of information on a wide variety of topics, including the areas of automotive, body and health, computers, electronics, engines, home, Internet, entertainment, money, science and technology, society and culture, toys and games, and transportation, among others. Includes features such as the homework help chat forum, website newsletter, frequently asked questions, opinion polls, and multimedia options. "A collection of articles written by Marshall Brain, who, according to the web site is 'nationally recognized for his ability to communicate complex ideas clearly.' The articles describe how common "stuff," such as how an appendix, electricity, car engines, modems, etc., work. Both fun and informative, the articles contain exceptionally simple and descriptive graphics and numerous links to relevant information throughout. It features a table of contents and a search engine to help move around but a better web design would greatly improve access to this gold mine of information."--"Best Free Reference Web Sites 1999." RUSA Quarterly, Fall 1999; reviewed Feb. 13, 1999.