There's a lot of exciting stuff going down at open wikiblogplanet (an aggregator for blogs about wikipedia).

A solar furnace is a structure used to harness the rays of the sun in order to produce high temperatures. This is achieved by using a curved mirror (or an array of mirrors) acting as a parabolic reflector to concentrate light (Insolation) on to a focal point. The temperature at the focal point may reach up to 3,000 degrees Celsius, and this heat can be used to generate electricity, melt steel or make hydrogen fuel.

via kottke

Talk is cheap unless it's on the wiki

I've made a sort of nonprofit ad banner for the site -- you can see it if your screen's wide enough; otherwise, here it is:

People currently in outer space (yes, at this exact moment).

List of wars on concepts