National Geographic invites you to "Harness the Power of Wind" with its Wind Power Simulator. Consider yourself RSVP-ed...

The nifty Flash widget offers a look at the guts of a turbine, an explanation of how it converts wind power into electricity, and links to other wind power resources. But the fun part comes after hitting the "Try It Out" link. Here you can manipulate the blade radius, wind speed, tower height and altitude to see how many kilowatts are produced and how many homes your setup would power.

If after a few minutes you're left wondering why there appears to be a desired altitude for wind power, hit the "Generating Power" button and you'll see how all that air at higher elevations isn't necessarily a good thing.

And you thought they only published dead tree magazines with pretty pictures.