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Beyond the small mining town of Newman in Western Australia lie the first fairy circles scientists have described outside of Africa.
These patches of bare soil dot outback grasslands in almost regular polka-dot patterns, just like the puzzling circle landscapes known from Namibia,
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, says ecologist Stephan Getzin of the Helmholtz Center for Environmental Research-UFZ in Leipzig,
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, Germany. He and his colleagues publish the first scientific description of Australia’s fairy circles?online March 14 in the Proceedings of National Academy of Sciences,
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. The team proposes that the oddities arise from life-and-death struggles between plants.
Explaining what causes fairy circles has become ecologists’ version of crop-circle mysteries (SN Online: 8/20/15). Until now,
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, the debate has focused on scatterings of circles from an arid zone in Africa. Getzin heard about the Australian circles in 2014 when a burst of news stories about his latest fairy circle paper inspired Australian environmental scientist Bronwyn Bell of Perth to e-mail pictures of what she saw around Newman. “I was extremely surprised,
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,” Getzin says.
He and colleagues examined the new site for themselves,
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, finding hard-baked reddish soil in the gaps instead of the more permeable sand in Namibia’s circles. But otherwise, Australia’s arrays of bare spots about 4 meters wide had a familiar fairy circle look with each spot circled by roughly six more.?
Using a computer simulation,
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