Willow catkins are accumulated on a street in Beijing on April 15, 2015. [Photo by Gong Yingchun/China.org.cn] The Liaowang Institute has published a new research article on Beijing's poplar catkins, ...
LIKE MOST blizzards, it begins with just a few white wisps swirling about. Gradually the volume increases and the stuff starts to accumulate on the ground. During the heaviest downfalls the air is so ...
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