It turns out those leftover slices still sitting in the box on your coffee table from that pizza you got delivered, should have been thrown out a long time ago, but those steaks in the freezer are good for 6-12 months.
At Makezine.com’s Tools-N-Tips, there was a link to AlgerWiki, containing a good reference to expiration dates for food items.
(The link no longer works September 23, 2009; here is Google’s cache of the page)
Phillip Torrone, over at the Make Magazine Blog, pointed out this interactive Periodic Table of the Elements by Theodore Gray at PopSci.com. This is a real Periodic Table table that Theodore Gray built.
When I was a kid, there were only 103 known elements. I also used vacuum tubes to build my electronic projects – though I did venture into the modern era with a Knight Kit C555 transistor walkie-talkie kit.