The most intricate crop circles, which have baffled experts and fuelled rumours of alien visitors, have relied upon careful planning and execution. In the past, the best crop circles have attracted ...

Add Yahoo as a preferred source to see more of our stories on Google. Round discs of barren dirt known as “fairy circles” look like rows of polka dots that can spread for miles over the ground. The ...

Perfect circles of stones cover the ground in parts of Alaska and the Norwegian islands of Spitsbergen. Elsewhere in the far north, stones form other striking patterns on the ground: polygons, stripes ...