studenthacks.org

Columbia University physicist Brian Greene recently chose the winner of the String Theory in Two Minutes or Less user-generated video contest. Check it out:

This web-based Periodic Table of Elements is pretty freakin’ cool. It’s built entirely in XHTML, which allows you to copy, print, and resize the data however you want.

You can easily view the properties of each element (which pulls data from Wikipedia), and dynamically switch the layout to focus your attention on orbitals, isotopes, or whatever you’re interested in. There’s even a printable periodic table of elements (pdf) that’s pretty cool too.