會生長的石頭 - Environmental Graffiti

Near a village, just south of central Romania a number of stone formations with alien features lie dormant, witnesses to the passing of time; that is – until it rains. Not long after the last drops of water fall, they begin a multiplication process. Small oval or round blain-like forms appear on the upper part of them. Many people are amazed and even locals are impressed when after heavy rainfall these rock formations begin to ‘live.’ Locals have aptly dubbed them, “growing stones.”
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來源: http://www.environmentalgraffiti.com/ecology/natural-design-series-stones-that-literally-grow-by-themseleves/1232