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RATS TO THE RESCUE

ratcom.jpg"Rats equipped with radios that transmit their brainwaves could soon be helping to locate survivors buried in the wreckage of collapsed buildings," according to New Scientist.

Rats have an exquisitely sensitive sense of smell and can crawl just about anywhere. This combination makes them ideal candidates for sniffing out buried survivors. For that, the animals need to be taught to home in on people, and they must also signal their position to rescuers on the surface.In a project funded by Darpa, the Pentagons research arm, Linda and Ray Hermer-Vazquez of the University of Florida in Gainesville have worked out a way to achieve this.First the researchers identified the neural signals rats generate when they have found a scent that they are looking for. When a dog is sniffing a bomb, he makes a unique movement that the handler recognises, says John Chapin, a neuroscientist at the State University of New York in Brooklyn who is collaborating on the project. Instead of the rat making a conditioned response, we pick up the response immediately from the brain.
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