Fairy circles are circular bare patches of ground, typically found in
desert stretching from Angola to South Africa. These circular patches
ranging from 2 to 15 meters in diameter, occur amidst monospecific
grassy vegetation. These circles have been studied since they were
reported on in 1971. The controversy has been ongoing for years over the
formation of these circular patches.
Walter Tschinkel, a biologist at Florida State University, analyzed 4
years of satelite images of Namibia's NamibRand Nature Reserve since
2005 and concluded that these circles are under continuous development,
with an estimated an average "lifespan" of 41 years. But he couldn't
figure out what made these circles. Later, Norbert Juergens, a German
biology professor at the University of Hamburg, has found evidence that
these fairy circles are result of local ecosystem generated by the sand
termite Psammotermes allocerus. But Juergens' research has not been
universally accepted as cause of circles.
Apart from the scientific reasons, the local people believes that these
barren patches are said to have been caused by the gods, spirits and/or
natural divinities. These fairy circles are used for agricultural use by
local people.
Source : en.wikipedia.org
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