This site explains why three percent is a fundamental limit of X-ray detectors that use the conventional method of conversion to electric charges, and if a higher spectral resolution is required astronomers have to...

These PDF files are Illustrated Lectures from his Earth history class (entitled introductory biology). The PDF files contain a lot of projection-ready graphics that may be useful in introductory Earth Science lectures....

Get involved with this non-profit organization dedicated to the restoration of the Chesapeake Bay. Site contains descriptions of its programs plus an online version of their newsletter, Bay Journal. Also features...

This lesson provides an introduction to the use of the sun's energy. Topics include the history of solar energy usage and its more recent adaptations. There is also discussion of how the sun produces and radiates energy,...

Over the past few years, the American Geological Institute (AGI) has assembled a nice mix of resources for earth science educators, including promotional videos such as "Why Earth Science?" and a terrific world image...