
Drone image of the fairy circles and a lonesome tree in the Giribes Plains. Hundreds of thousands of fairy circles occur in the Giribes without any Euphorbia damarana in the vicinity. These typical fairy circles of the Giribes have a regular pattern, mostly with an extraordinary degree of spatial ordering. By contrast, euphorbias in the isolated location where Theron marked the shrubs had an opposite clustered pattern, which cannot explain the origin of the regularly distributed fairy circles.
Photo credit: S Getzin, University of Göttingen
The great thing about science, and what gives it its power as the tool for discovering the truth, is that it has self-correction built in, and every properly-constructed theory is falsifiable. In this example, we see a theory proposed back in 1979 to explain the phenomenon of the 'fairy rings' of Namibia being systematically falsified by observations which could not be true if the theory is correct.
The 'fairy rings' of Namibia is a vast area on the edge of the Namib dessert in which there is a pattern of regularly-spaced circles of barren soil occurring in an essentially mono-specific grassland.
In 1979 a South African botanist, G.K. Theron, published a theory that the circles were caused by toxins in the decaying leaves of the plant Euphorbia damarana. This theory has now been falsified by researchers led by scientists from Göttingen University, as the Göttingen University news release explains:






















