This comprehensive site is an introduction to sea ice: what it is, how it forms, how it is studied, how it affected historical expedition in the polar regions, and what role it plays in the global climate. The site...

This National Snow and Ice Data Center website presents a variety of general information about snow. It includes a question and answer section, which explains why snow is white, and the difficulties of forecasting snow,...

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...