“Sawfly（锯蜂）” 是一种与黄蜂相似的昆虫，这种昆虫会切开植物并把自己的卵产在切口处。苏格兰赫瑞-瓦特大学的研究人员一直在研究雌性锯蜂怎么知道如何做出这种独特的切割，从而避免杀死或损伤植物。

They were sick of the incessant school closings. They were sick of seeing charter schools open that get wildly uneven results yet are praised to the skies by Arne Duncan and now Rahm Emanuel. They ...