The most famous museum in the world used an incredibly insecure password to protect its video surveillance system. Here's how to learn from the Louvre’s mistakes and improve your own security.

“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。