Scientists have been left puzzling over the origin of Namibia's mysterious fairy circles for nearly half a century - but they may have now conjured up the answer regarding the strange spirals in the ground.
About 80 to 140 kilometres from the coast, in the Namibia coastal desert, Southern Africa, there are millions of what have been described as "fairy circles".
They are circular gaps in the grassland - each ranging a few metres in width - and together form a distinctive pattern across the whole landscape, making it visible for miles around.
