- Ask A Scientist - physics, chemistry, mathematics, computer science, polymer science, display engineering, and information management. Biology and life sciences are not their areas of expertise.
- Science Matters - a question and answer forum.
- Mad Scientist Network - provides answers to science questions, edible and inedible experiments, a tour of the Visible Human Project, and an index of resources and web links.
- Did You Ever Wonder? -
- Last Word - why is the sky blue? Why does hair turn grey? Answers to readers' questions from the column in New Scientist magazine.
- Ask Dr. Fred - scientist, researcher, and teacher Dr. Fred Bortz will answer questions about any scientific topic that interests you.
- Ask Dr. Universe -
- Scientific American: Ask the Experts -
- KnowWhat.com - questions and answers provide examples of scientific principles at work in everyday life, and explain why things are the way they are.
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