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Contemplation of geometry yields more than attempts to explain

At last it is August, time to leave the tribulations, trials and triumphs of sustainability and think about something completely different for a change. Crop circles, perhaps? I first encountered crop circles one summer evening, driving across Salisbury Plain on the A303. As I approached Stonehenge (tut tut, millions spent, still nothing done), I noticed on the opposite side of the road a large number of parked cars and a sizeable gathering of people in a wheat field nearby.

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