Conifers' helicoptering seeds are result of long evolutionary experiment
Berkeley CA (SPX) Mar 23, 2015 - The whirling, winged seeds of today's conifers are an engineering wonder and, as University of California, Berkeley, scientists show, a result of about 270 million years of evolution by trees experimenting with the best way to disperse their seeds. The first conifer species that produced seeds that whirl when they fall used a variety of single- and double-winged designs. Whirling, or helic ... more
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