Web Watch

http://www.stetson.edu/~efriedma/puzzle.html

Erich Friedman, a mathematician at Stetson University in DeLand, Florida, conducts research in game theory, geometrical packing, computational complexity, and graph theory. Not surprisingly perhaps, he also devises mathematical puzzles. You can find hundreds of his challenging creations at Erich’s Puzzle Palace.

http://www.snowresearch.org

Snow Research, an online resource put together by the US Army’s Cold Regions Research and Engineering Laboratory, covers not only the science of snow, but also such practical topics as the impact of snow on military operations. The lab is based in sometimes-snowy Hanover, New Hampshire.

http://www.opticsforkids.org

Flash, an animated shooting star, guides children I through a new educational website from the Optical I Society of America. Optics for Kids includes games I and experiments for children and lesson plans for I teachers, parents, and guardians.

To suggest topics or sites for Web Watch, please visit http://www.physicstoday.org/suggestwebwatch.html . Compiled and edited by Charles Day