Arts & Culture

www.pbs.org

dictionary.com

General Science

Scientific American's Ask an Expert

Ask How Things Work

Ask a Mad Scientist -- Many different topics

List of Universities online

Ask a Remote Sensing Scientist

Dr. Universe (K-6)

Astronomy & Space Science

Ask the Space Scientist

Ask a NASA Scientist

Ask Dr. SOHO

Biology & Life Sciences

SchoolWorld Zoo Experts

Ask a Health Expert

Plant & Pest Diagnostic Laboratory Experts

Ask a Biologist (Arizona State University)

Physics

Ask Physics Questions

Oceanography

Ask Shamu -- SeaWorld (questions about ocean or marine animals) (K-6)

Ask Jake the Sea Dog -- Whaletime (questions about ocean or marine animals)

WhaleNet A.S.K. "Scientist of the Week"

Geology

Ask a Geologist -- United State Geological Survey (USGS)

Ask an Earth Scientist -- Dept. of Geology and Geophysics at U. of Hawaii. Faculty experts on volcanoes, geochemistry, geophysics, earthquakes, minerals & gems, sediments & sedimentary rocks, hydrology and natural hazards.

Ask a Geologist -- Geological Survey of Canada

Ask a Volcanologist -- Volcano World

Mineral Resource Specialist Directory -- United State Geological Survey (USGS)

Ask a Diamond Expert -- Van Daaz diamonds

Ask a Diamond Expert - DiamondTalk.com

Ask a Paleontologist -- Illinois State Geological Survey (Dino Russ' Lair)

Lamont-Doherty Earth Observatory -- Columbia University

Ask a Gemologist

Weather

Ask a Weather Expert

Ask a Hurricane Hunter

Medicine

Ask A Health Specialist

Ask a Mayo Clinic Physician

Ask an Oral Maxillofacial Surgeon

Ask the Optometrist

Health

Ask-A-Nurse

Ask the dietitian

Ask the Psychiatrist