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Ask A Geologist
Do you have a question about volcanoes, earthquakes, mountains, rocks, maps, ground water, lakes, or rivers? A service of the earth scientists at USGS.
Ask a Marine Science Expert
Email your question after checking the archive of previous questions and answers.
Ask a Rocket Scientist
Explains design, technology, aerodynamics, history, space travel, and other topics related to aerospace engineering.
Ask A Scientist
You can ask a scientist a question on the WWW MadSciNet: The 24-hour exploding laboratory.
Ask A Scientist About Liquid Crystals
A starting point for students and teachers interested in liquid crystals and the science and mathematics from which they arise: physics, chemistry, mathematics, computer science, polymer science, display engineering and information management.
Ask a Volcanologist
All things volcano related, plus archives of previous questions.
Ask An Aviculture Expert
Birds and bird care questions. Not a substitute for a trip to the vet.
Ask an Earth Scientist
Experts at the U of Hawaii answer questions about volcanoes and igneous rocks, earthquakes and seismology, natural disasters, geochemistry, the environment, pollution, hydrology and water quality, minerals, gems and crystals, geophysics, sediments and sedimentary rocks, and just plain ol' geology.
Ask Bob Treat
Answers to questions in the natural, social and computer sciences from Bob Treat. Post your question and you'll usually get a response within 24 hours.
Ask Dr. Global Change
He stands ready to answer your most difficult questions about global change on planet Earth. Archives are available.
Ask Dr. Universe
Dr. Universe has a whole university full of experts ready to tackle your question on any subject. Explore the question of the day, and longer featured answers.
Ask Mr. Water Wizard
Do you have questions about water? Questions about water quality in some nearby stream or lake? About drinking water? About water quality testing? About aquatic life such as fish, turtles, snakes, and insects, in your local waterways? Mr. Water Wizard can help.
Ask Shamu
Ask and read archives of questions and answers. Mainly about marine biology and the environment.
Ask The Space Scientist
Ask a question and check out the extensive archives for the many questions asked at this site.
Computer Help Center
Helpful Answers to your Computer and Internet-related Questions.
Curious about Astronomy? Ask an Astronomer!
Browse archives of previous questions and answers, or submit a question to be answered by astronomers at Cornell University.
Experts Exchange
Ask questions about all things related to computers. You must register/login before you can participate at this site.
How Things Work
Ask about almost anything related to the physical world, and check the well-organized archives for answers to previous interesting questions.
NEWTON Bulletin Board System
Ask-a-scientist service designed for K-12 teachers and their students - operated by the Argonne Nat'l. Laboratory, Div. of Educational Programs.
Physlink - Ask Experts Physics and Astronomy Ques
Ask questions and check out the archives, organized by topic.
Science Questions & Answers
Expert responses to questions on biology, chemistry, geology, and other branches of science.
ScienceNet
A free science information service, staffed by scientists who are expert in explaining complex topics in everyday language. Search the online database of previously answered questions. If you can't find an answer then send your question via e-mail.