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

Enrico Fermi’s ability to make quick, rough estimates has inspired the University of Maryland’s Physics Education Research Group to compile a set of Fermi Problems. A sample question: “How many pencils would it take to draw a straight line along the entire Prime Meridian of the earth?”

The American Institute of Physics is now using the popular short-message service Twitter. By following AlP’s tweets, you can keep up to date on AlP’s publishing and media activities.

From the Materials Research Society comes Materials360 Plus, an online source of news and information about understanding, making, and using materials, both new and old.

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