Euler's Identity...

For the geeks, a decoded crop circle:

After transcribing the binary digits, I translated each byte (8 bits) into its corresponding ASCII character with this handy online converter, starting from the direction of the windmill, and working clockwise around the circle and out from the centre. (If you're having trouble following this, see the animation linked at the bottom of the article).

The result was this:

e^(hi)pi)1=0

It looked like some kind of equation, and when I looked it up, Google asked if I meant: e^(i)pi)1=0, for which the top result was Euler's identity: eiπ+1=0. This has been called "the most beautiful theorem in mathematics". No surprise that it should turn up in a crop circle then!