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(Natural News) The human nose can distinguish at least one trillion different scents. Many of these smells will come and go fairly quickly. However, others, such as disgusting smells, don’t disappear fast enough. The brain recognizes smells with the help of special sensory cells known as olfactory receptor neurons that are located inside the nose. Once... |
Wet-dog smell, tobacco smoke and skunk spray: Various factors affect how long an unpleasant scent lingers, explain researchers
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