Mystery in Namibia: Researcher finds new clues to mysterious fairy circles. Studies now support one of the theses discussed: The spots are probably the result of water shortages.
Some of them are three meters in diameter, others more than 20. The so-called fairy circles can also be found in Australia. While desert grass grows around it, the interior remains bare. The researcher uses geometry to explain why circles form when drought occurs. In contrast to squares or hexagons, a circle has a more favorable ratio of circumference to area.