Killer Bees Making Super Coffee

inblosam writes "An article at cnn.com describes how a insect-pollinated coffee bean plant actually has an increased yield, by 50 percent or more, when a killer bee does the pollination. The gene mixing allows for better gene selection, making better and bigger beans. Way to go killer bees. If the bees don't kill you, the gallons of coffee may." I guess I don't understand why it matters that it's a killer bee versus a regular bee. Maybe the killer bees travel farther, mixing up the pollen better?