Friendship’s Dark Side: ‘We Need a Common Enemy’ Friendship generally is regarded as an unalloyed good. But scientists have found it also can be a conspiracy, a way to separate “us” from “them.” Share: Facebook Twitter Google+ Stumble Digg Email ThisBlogThis!Share to XShare to Facebook Related Posts:Planets the size of Earth roam the outer darkness of spaceGlobal Health: In Some Countries, Women Get Days Off for Period PainROBOT WARNING: Millions to lose their jobs to AI and we need to act NOWQ&A: Even Tiny Changes in Earth’s Orbit Would Yield Global CatastropheHumans and dogs to have CONVERSATIONS within a decade as technology developedIt’s High Time for Ticks, Which Are Spreading Diseases Farther