In much the same way that humans focus their eyes, animals use sniffing techniques to zero in on smells.
“Dogs, for instance, are quite dependent on their sense of smell,” says study author Leslie Kay, associate professor of psychology and director of the Institute for Mind & Biology at the University of Chicago.
“But there are many chemicals in the smells they detect, so detecting the one that might be from a predator or an explosive, for instance, is a complex process.”
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