纳米比亚沙漠中的神秘精灵圈现象
From the air, the Namib Desert reveals a pattern that seems almost designed: millions of barren, circular patches dotting the golden grasslands. These fairy circles, ranging from two to fifteen meters wide, form a honeycomb-like mosaic that stretches for hundreds of kilometres. For decades, they have baffled scientists and inspired local legends, making them one of nature’s most enchanting puzzles.
Standing on the ground, a circle is clearly defined by a rim of taller, healthier grass that thrives at its edge, while its interior remains sandy and bare. The circles appear and disappear over the years, typically lasting a few decades. They are found nowhere else in the world on this scale, occurring mostly in the remote Kunene Region, where annual rainfall is scarce and the soil is nutrient-poor.
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