In November 2007, University of Tokyo researchers working with mice reported the results of a curious experiment. Removing certain receptors on the olfactory bulbs of the mice's brains produced a batch of fearless rodents. To prove their point, the scientists showed photos of a brown mouse within an inch of a cat (which had been fed beforehand), sniffing up its ear, kissing it and playing with its collar.
Sources
Reuters, c. Nov. 20, 2007
