We are used to bomb squads that go "woof." Now they may go "bzzzzz."
Researchers at the Los Alamos National Laboratory have trained honeybees to stick out their proboscis when they smell explosives. The effort is called the Stealthy Insect Sensor Project. Operational use is some way off, but, if the bees prove sensitive and reliable enough, the advantages of cheap, tiny bees over large, ground-walking dogs or complex sensing machines are obvious.