Researchers from Northwestern University have developed a new technique to rechannel memories while subjects sleep—by blasting them with various odors. It’s like Eternal Sunshine of the Spotless Mind in Smell-o-Vision.

For the experiment, scientists conditioned patients to be afraid of a certain face by showing them a picture of the face along with a specific smell and then administering an electric shock. Patients would eventually learn to fear not only the image of the face but also the associated smell. The smell would trigger fear even when the patient was asleep and not being shocked, but after so many exposures, the fearful reaction would fade away. In effect, the exposure to the smell would do away with the fear.
via Gizmodo

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