"Let"s say you"re a bee that ends up in a spider web, and a spider is swiftly coming towards your across the web," says Lars Chittka, who leads a research group that studies bee cognition at Queen Mary, University of London. "It"s not impossible that the escape responses are all triggered without any kind of emotions. But on the other hand, I find it hard to believe that this would happen without some form of fear," he says.