How Your Dog’s Nose Knows So Much | Deep Look

by birtanpublished on August 21, 2020

to us this is just a field but to this dog it's a portal through time she can peer into the past what happened an hour even a week ago thanks to this exquisite olfactory

Device Zinka is a search-and-rescue dog a champion sniffer today she's working with researchers from the University of California Berkeley yes she is she's wearing a GPS device and other sensors

So they can figure out how she tracks smells so well like from this hiker because tracking smells isn't like following a dotted line on a map odors don't spread out evenly they're all swirly twist it around by air

Currents but zing cos nose can make sense of that it's a precision instrument like us dogs can tell if smells are coming from the left or right because their nasal passages are completely divided but here's how Zinka

Totally out does us when she sniffs in most of the air goes into her lungs but some of it splits off into a separate stream that goes into a special chamber called an olfactory recess inside there's an intricate maze of little

Passages here's a researcher scan of what it looks like in cross-section all those twists and turns create a huge surface area which hold more than half a billion sensory cells that feed information to the brain that's 15 times

More than we have all of our sensory cells are in this little patch and we don't have a special chamber for smelling when Zinka exhales the air is blasted out the side through those slits

So she can take in a fresh sample each time first she gets a sample something the hiker is warm then she hits the trail sniffing about five times per second

Gingka can pick up the tiny amounts of scent down to the molecules the hiker left behind that we would never notice she could easily tell her apart from other humans as she finds her way

Through the maze of trails which links her right to the hiker that girl's Inca hey they're deep peeps we love making

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