neighborhood
2008-12-22 10:07
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科學(xué)60秒:存在鉆石星球？
Imagine climbing diamond mountains, or hiking around the graphite shores of a lake of tar. Sound a little sci-fi? Well a new discovery suggests planets like that might be out there—planets with...
晨讀美文055
晨讀美文It is commonly believed that only rich middle-aged businessmen suffer from stress. In fact anyone may become ill as a result of stress if they experience a lot of worry over a long peri...
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