Crop circles are so 1990s. Nowadays, my favorite mysterious, creative phenomenon is snow art. Did aliens make it? Does it indicate some old druid structure hidden beneath the snow? Or is it just down to some insanely creative artist?
There's no reason to think that crop circles are the work of aliens - particularly when human pranksters have already admitted to making them - but they're still mysterious... not to mention a fascinating junction point between physics and art.
Apparently bored with abducting yokels and being shot at by Will Smith, some erudite extraterrestrial has deposited a crop circle in England that puts our left brains to the test. What you're looking at, Earthlings, is a complex mathematical theorem.