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:Terminator-style KILLER ROBOTS are on the way, says Google chiefBack in time: Scientists see BEGINNING of stars in major breakthroughEurope Was Colder Than the North Pole This Week. How Could That Be?NASA Atlas 5 launch LIVE stream: Watch the giant rocket launch online HEREThey Died Near the Border. Art Students Hope to Bring Them Back.Richard E. Taylor, Nobel Winner Who Plumbed Matter, Is Dead at 88