Look closely, that's not a dog ... it's a human (wearing a blindfold, earplugs and gloves) following a scent trail through the grass:
In a paper appearing this week in the advance online edition of Nature Neuroscience, UC Berkeley researchers report conclusive evidence from these experiments that humans do indeed gain a performance advantage from cross-nostril comparisons. They also found that humans can scent-track, and that, with training, they can improve their accuracy significantly while nearly doubling their speed along the scent trail.
Link - Thanks aware
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What is the yellow line? Is it added by computer for study purposes or Is it something that they can follow with their hands or by touch? Even though they have gloves on, they can still touch their noses to the ground....
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