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shared by pepa garcía on 22 Aug 11 - No Cached

"The smells have different layers, which probably give dogs a much bigger range of types of information."
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But the dog's eyes are just a back-up.
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The dog could imagine the future by picking up the scent of the dogs, humans or other objects coming towards them on the breeze.
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they inhale air from two distinct regions of space, allowing the dog to decipher the direction of a scent.
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The sniff also funnels stale air out through the sides of the nostrils, an action which pulls new air into the nose.
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Once inside the nose the air swirls around up to 300 million olfactory receptors, compared with our measly 6 million
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the dog olfactory cortex, which processes scent information, takes up 12.5 per cent of their total brain mass, while ours accounts for less than 1 per cent.
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shared by pepa garcía on 26 Sep 13 - No Cached