Build 50-watt Light Bulbs from 2-Liter Bottles

Talk about your village ingenuity. (And yes, clearly, it's only for indoor lighting during the day)

Check more discussions at Makezine

Free video lectures from the world's top scholars

Thousands of video lectures from the world's top scholars. Some of the subjects included are Astronomy, Biology, Chemistry, Computer Science, Economics, Engineering, English, Entrepreneurship, History, Law, Mathematics, Medicine, Philosophy, Physics, Political Science, Psychology, and Religion.

And you can download them too. Check out http://academicearth.org

Here is one of the interesting ones I found on this website:

The World is Flat 3.0 - Thomas Friedman

What did you do?

Nice quote from PravsWorld:

Tomorrow God isn't going to ask:
What did you dream?
What did you think?
What did you plan?
What did you preach?

He's going to ask: What did you do?