Bummed-Out Bees

WSJ.com: "Honeybees under stress apparently become pessimistic, just like anxious mammals (including humans).

First, researchers trained honeybees to recognize two odors. One signaled the presence of tasty sucrose; the other was linked to the presence of either a diluted sucrose solution or bitter quinine—50-50 odds. Half the bees were then shaken, for one minute, to simulate an attack by a predator."