does anyone know why dogs sense of smell is better than humans?
108776
A dog's nose has 200 million or so scent receptors make it much more sensitive than the human nose. The longer the dog's nose, the more scent receptors it has and the better it can smell. Dogs with the best sense of smell, such as beagles and bloodhounds, sometimes called "scenthounds," have long snouts that house a complicated network of tissues, mucus, and scent receptors that enable a dog to smell so well.
146302
You dog has a nose, but his snout may be very small.  The mechanism of smelling is internal.
929328
Found some info hope it answers your question...\n\n\nMany people believe that if a dog has a cold, wet nose, he must be healthy. There is some truth to this old adage, but it is largely a myth. The true reason for the dog’s wet nose lies in basic physics. Dogs have very few sweat glands as compared to people. However, when a dog’s body temperature rises, it must still dissipate the excess heat. A dog uses his nose to relieve this buildup of body heat. Heat will escape through a dry nose, but a wet nose is more effective.\n\nHow does the nose get wet in the first place? Watch your dog; you will notice that every so often he licks his nose. A warm, dry nose simply means that your dog has been sleeping. When asleep, dogs don’t lick their noses!
852474
scent is hard to quantify. \nUsually you have to figure out its components e.g by using gas chromatography or mass spectrography. Then you can figure out the amount of each substance present. \nAlternatively you can measure scent by the reaction of an organism to it, e.g. how much you drool if you smell your favorite food. But that also means the reaction of the organism depends a lot on the scent and organism chosen. For example a male moth will react to one molecule of the pheromone the female moth gives off. I don't know if humans can even smell that stuff.
1183720
It's pshychological.  People associate smell with feeling...you feel better after you use the restroom, so you associate relief with that smell.\n\nIt's been researched, but I don't have a link to a source.
759225
Ok, Anthropoids include New World monkeys, Old World monkeys, apes, and humans. Some of the general characteristics are:\n-Larger brain.\n-Smaller olfactory/nasal regions (worse sense of smell because our noses don't stick out as, say, a dog's.).\n-Better manual dexterity (meaning they can manipulate things with their hands, like humans do, instead of batting things around with paws, like cats do).\n-Fully Binocular vision (both eyes focus on the target, instead of each eye doing its own thing).\n\nAs for impacts on humans... Hmmm... I'm just making this part up as I go along, but possible influences and negative effects could be given as (+ = positive impact, - = negative impact):\n+Larger brain lets us process more information, so we're smarter, so we can make use of our other skills and have more meaningful interactions; such as communicating while hunting, or creating new tools.\n-Smaller olfactory regions would mean worse sense of smell, so it would be harder to track things be scent, or smell predators.\n+Better manual dexterity lets us make and use tools, build shelter, and process food (like harvesting and preserving crops for winter).\n+/-Full Binocular vision limits us to tracking only one thing at a time, but it also lets us judge distances for things like jumping, and track movement so we can catch things.
1027377
Sexual Pheromones and Sexual Desire\n\n\nImagine an invisible, undetectable force that's powerful enough to override your sense of reason yet draws you to someone with an almost animal passion. These aren't Cupid's mythological arrows, but real shots of human pheromones. Scientists have been researching for years whether or not humans, like other animals, exude these secret scents, with attention focused on a small organ composed of two small pits a few centimeters up the nose. \nBiologists describe pheromones as "smellprints" supposedly as unique to each of us as our fingerprints. Smell is the most primitive of human senses and, unlike sight and touch, travels a direct route to the brain's limbic lobe where it can provoke an emotional reaction that can, quite literally, be a turn-on. \n\nThere's no doubt that pheromones underlie sexual and other types of behavior in animals, but given the complex human psyche, can these invisible lust signals be all you need for love? The scientific verdict is pending, but an increasing body of evidence suggests that the chemistry of sexual attraction and arousal is more nature than nurture and quite beyond our control. Not so far-fetched a notion considering how often we speak — and sing — of sexual chemistry. \n\nLove or lust — the question hasn't stopped the fragrance industry from attempting to cash in on the accumulating knowledge about pheromones by producing synthetic versions of these elusive chemicals. True, the new fragrances aren't billed as aphrodisiacs. Instead, they're advertised as mood-enhancers designed to help you relax and shed your inhibitions. \n\nWhile there's absolutely no proof that they can deliver on any kind of erotic promise, the new pheromone perfumes are selling briskly, even to repeat customers. Which may prove, yet again, that when it comes to aphrodisiacs, nothing trumps the power of suggestion.
1181090
You are so funny!!!  I'll just bet they do.  Animals are smarter than their human counterparts.
1017946
they can't smell it.  just like people don't mind the smell of thier own poop or thier own farts.  I think its a defense mechanism built into our physiology to protect us from ourselves.  lol
774408
No it is a myth dogs have real good hearing and can hear stuff that you do not so they hear it and bark at it.\n\n\nHowever, I am sure there are cases that a dog hears someone that was going to kill someone but was just barking because it heard him.
247610
Yes, of course, I believe that all man and women have different smells and when ever you find the right one is not because you liek the way they look or the way they talk or anything like that but is because of the way they smell to that specific person, my mom used to say that all the time, our body hair releases that smell, and that's the reason why some people just fall in love with each other without paying attention to appearances and that is also the reason of why some super hot people are still single, because no one has yet find their smell, it may sound a little too ridiculous but that's just the way I see it!!!!
566341
Humans have three types of color receptors (light-sensitive cells) in the retina.\n\nDogs have only two.  So dogs are not (as some people say) completely color blind.  They can distinguish between blues and yellows ... but not between reds and greens.\n\nThe technical terms are that humans are 'trichromatic', and dogs are 'dichromatic.'
112706
This is what i found on a website listed below it also has more on that page about fear as an emotion also.  somthing i didnt see in that paper was how animals can smell fear because of the chemical response our bodies have because of fear and the surge of adrenilin it can create.\n\n\nWhat is fear? Technically it is a fight or flight response to a real or perceived threat. Fear is an emotion that responds to threatening situations. Animals exhibit fear and have elaborate defense mechanisms built in to respond to threats. Because we are physically an animal so do we. We respond to threat pretty much in the same way an animal does. Except that humans have a higher mental capacity that animals. This is a gift that separates us from the animal kingdom, but at the same time gives us rational thought. So that humans can reason their situations out and react not in a rigid way as an animal does, but in varied ways. \nAn animal cannot choose to be not fearful, it either is or isn't fearful depending on the situation. Animals are programmed to respond based on instinct. That is that they do what they do because they are compelled to act in a certain way. Humans have some of the same instinct tendencies that animals have, but with the capacity to rationalize our situations, we can, no matter what the threat, real or perceived, choose to fear or not to fear.
509630
They are very real. We as humans are only given 5 senses. Who is to say that there are other senses that exist but we just cannot utilize them or it is not within our powers? Dogs & Cats or other animals have heightened sense of sight & smell thus allowing them to detect the presence of the unknown before we do. \n\nRemember this, we are all spirits embodied in a human form. When we die we take our conscious and subconscious with us and go back as spirits again.  When we die suddenly, our spirits will be earthbound. Until we realize we are dead, we become ghost.
1032893
Cold cat (the feline species taste better than the canine species)\ncat is much milder meat \ndog taste like a dirty wet dog smells\n\nBUT RAT MEAT TASTE BETTER THAN EITHER
1033725
Simple evolution my boy... those of us who think poop and all its relatives smell bad have been naturally selected for survival because we avoid things that smell "bad" and therefore we aren't as exposed to all the nasty germs and bacteria that come along with excretement as much as a person who thinks it smells like roses.
1153781
Dogs don't "sweat" through their skin like we do.  They dissipate heat by panting, & the closest thing they have to sweat glands are in their paws, so when they are hot, the perspiration goes through their paws, & the fritos smell is basically their "B.O.".