Over 8500 articles, 115,000 dictionary terms, and hundreds of Research Updates in all areas of science and technology; from McGraw-Hill.

Published by the Environmental Information Coalition, and utilizing a wiki, it contains articles contributed by experts covering all aspects of the environment of the Earth.

In-depth articles on the solid Earth, covering seismology & structure; mineral physics; geodesy; earthquake seismology; geomagnetism; crust, lithosphere, mantle, & core dynamics; evolution of the Earth; planets & moons.

Biographical Sources

Full text articles on scientists, from classical antiquity to modern times.

Statistics & Data

Summarizes statistical information from American Statistics Index (ASI), Statistical Reference Index(SRI), and Index to International Statistics (IIS) plus links to some full text websites.