Easy as pi: Astrophysicist solves riddle of Britain's most complex crop circle:
Carved out in a barley field, this 150 ft wide pattern is said to be a pictorial representation of the first ten digits of Pi, one of the most fundamental symbols in mathematics.
The image is an example of what is known as a fractal, or geometric pattern.
Fractals have been a staple of crop circle designs for many years, the most well known being the Mandelbrot Set or the Julia Set, which appeared 12 years ago in Avebury Trusloe, Wiltshire.
Lucy Pringle, a renowned researcher of crop formations, has the largest database in the world on the phenomenon.
She said yesterday: 'This is an astounding development - it is a seminal event.'