NOAA - The National Oceanic and Atmospheric Administration (NOAA) conducts research and gathers data about the global oceans, atmosphere, space and sun, and applies this knowledge to science and service that touch the lives of all Americans.

How Stuff Works - widely recognized as a leading source for clear, unbiased, reliable explanations of how everything actually works, with thousands of articles and illustrations.

Measure 4 Measure Estimate, calculate, evaluate, translate; this site has over 100 different calculation/conversion programs to make life easier.

American Museum of Natural History Highlights of permanent and special exhibitions from amber to endangered animals.

EurekAlert! - EurekAlert! is an online, global news service operated by AAAS, the science society. EurekAlert! features news and resources focused on all areas of science, medicine and technology.

Guide to the Smithsonian Institution Links you to various museums, libraries and archives containing info on art, science, history and education.

Science Fair Project Resource Guide Links to science fair help for students, teachers and parents.

Science.gov A gateway to authoritative selected science information provided by U.S. government agencies. Over 1000 annotated sites are listed.

US Geological Survey - As an unbiased, multi-disciplinary science organization that focuses on biology, geography, geology, geospatial information, and water, the USGS is dedicated to the timely, relevant, and impartial study of the landscape, our natural resources, and the natural hazards that threaten us.