You might think scientists would be too busy cloning a race of genetically perfect sheep to field questions about oxygen molecules and volcanoes. But that's what's going down at MadSci.org. The Mad Scientist Network pools the collective craniums of hundreds of scientists versed in everything from astronomy to zoology. Visitors can submit a specific question or browse through the site's archives for past answers. Since the site is run by scientists, you're treated to organization that rivals taxonomic classification - information is sorted by subject, grade level, and keyword. If all this wisdom makes your head spin, fire up the Random Knowledge Generator to retrieve a sampling of questions and answers. To put your newfound smarts into practice, click on the MadLabs link and explore the Edible/Inedible Experiments archive. And spread the word - not all mad scientists use their knowledge for evil.