RATS not only have stereo vision and hearing, but they can smell in stereo too, enabling them to identify where a smell is coming from in just 50 milliseconds.
Researchers have long sought to understand how human brains pick up on the source of a scent, but experiments have been limited by the resolution of brain scans. So Upinder Bhalla and colleagues of the National Centre for Biological Sciences in Bangalore, India, used brain and nose probes to conduct tests on rats.
Bhalla found that 90 per cent of the cells in the olfactory bulb, the region of the brain…
