2 Quotes by Kay Frydenborg

And the olfactory part of a dog’s brain is forty times larger than a human’s; depending on the breed, a dog can have up to 300 million olfactory receptors in his nose, compared to about 6 million in ours. Even with that extreme superiority in equipment, dogs don’t merely smell a superstrong version of what we smell (or don’t smell); instead, they can perceive multiple layers of smell, which gives dogs a far greater range of information.

Of all the animal species alive in the world now or in the past, only a relatively few have been domesticated by humans, most of them in just the last few thousand years of human history. The dog was the first, by a wide margin—the only animal believed to have been domesticated by itinerant human hunter-gatherers, long before the development of farming and permanent settlements.