via Jalopnik:

This is Blackbird, it’s a wind-powered car designed by an aerodynamicist to end a longstanding internet debate, namely, ‘Can you go downwind faster than the wind?‘ Using high-tech designs and precise instrumentation, Blackbird proves you can.

Directly Downwind Faster Than The Wind (DDWFTTW) is a favorite topic of debate across the nerdverse for the combination non-existent answer and apparently conflicting nature of the question. “Wind only goes X-speed, how can you go faster? If you go faster don’t you violate the law of conservation of energy?” That’s usually the way the discussion goes.

+5 BA points!

edit: link to the website. (thanks, David!)