Easy TV

BBC Flatmates
FM.1 Welcome Michal
FM.2 Out for a Drink
FM.3 Helen in Love
FM.4 Problems in the Flat
FM.5 A New Flatmate
FM.6 The Movie Date
FM.7 Helen's Secret
FM.8 Helen + Michal
FM.9 New Year's Changes

Top Notch TV Fundamentals
F.1 Nice to Meet You
F.2 Who's that?
F.3 How do I get there?
F.4 Who's this?
F.5 You're late!
F.6 Do you like this blouse?
F.7 Welcome to my new apartment
F.8 What do you do in the morning
F.9 Making a weekend plan
F.10 Tonight I'm cooking
F.11 How was yout trip?
F.12 She has a fever
F.13 Do me a favor?
F.14 I'd like to get married

Top Notch TV 1
1.1 Giorgio Moretti
1.2 Interviewing Giorgio
1.3 Making a weekend plan
1.4 Paul gives directions
1.5 Cheryl's family
1.6 Bob's memory trick
1.7 What's in the salad
1.8 Eating healthy
1.9 Where are the tickets?
1.10 Paul and Machines
1.11 Bob's Exercise
1.12 Bob's Eexercise advice
1.13 Mr. Rashid's vacation
1.14 What a vacation!
1.15 Which do you prefer?
1.16 Fashion for Bob
1.17 A trip to South Africa
1.18 Paul's African Adventure
1.19 Bargaining
1.20 I'll leave the tip

Top Notch TV 2
2.1 Have we met before?
2.2 The Museum of Cheese
2.3 Choosing a movie
2.4 The movie star
2.5 Can I take a message
2.6 Hotel complaints
2.7 Paul's accident
2.8 A luxury van
2.9 How about a manicure?
2.10 Bob's haircut
2.11 A sit-down meal
2.12 What's for dessert?
2.13 What is that color?
2.14 Feeling blue?
2.15 Art for the office
2.16 Paul the artist
2.17 The computer expert
2.18 New office tech
2.19 Marie flirting
2.20 Bob the romantic

Top Notch TV 3
3.01 A little early
3.02 Etiquette in India
3.03 Are you ok?
3.04 Too much medicine
3.05 Rush job
3.06 Planning the party
3.07 Bob the dancer
3.08 The etiquette teacher
3.09 Planning the wedding
3.10 A new holiday
3.11 Somewhere safe
3.12 An epidemic in Finland
3.13 Bob's history book
3.14 Newspapers
3.15 New technology
3.16 Paul's phone buzzer
3.17 Discussing politics
3.18 I'm not a radical
3.19 Planning a honeymoon
3.20 A trip to Tahiti

isten in English

Your Dog's Nose Knows

Published: 11.22.2019
Level 5   |   Time: 4:00
Accent: American
Source: YouTube

Dogs have a famously great sense of smell, and this is what makes their noses so powerful.


triangle Directions

  1. REVIEW the vocabulary / background.
  2. WATCH the video.
  3. ANSWER the questions.
  4. CHECK your answers. (Show Answers)

triangle Vocabulary

  • a portal [n] - a doorway, gateway
  • peer into [v] - look into
  • exquisite [adj] - well-made, delicate
  • olfactory [adj] - relating to the sense of smell
  • a sniffer [n] - a person who sniffs
  • track [v] - follow the course or trail
  • a scent [n] - a smell
  • an odor [n] - a smell
  • swirly [adv] - move in a twisting or spiraling pattern
  • air currents [n] - streams of air
  • make sense of [exp] - understand
  • a precision instrument [exp] - an exact and accurate tool
  • tell [v] - differentiate
  • nasal [adj] - related to the nose
  • outdo [v] - do better than
  • split off [phv] - separate from the main passage
  • a chamber [n] - a room or space
  • a recess [n] - a small space
  • intricate [adj] - complicated and detailed
  • in cross-section [exp] - a shape that is exposed by making a straight cut through something
  • feed [v] - give continuously
  • a patch [n] - a small part of something
  • blast [v] - blow (air) with force
  • a slit [n] - a small thin hole
  • hit the trail [exp] - start a trip
  • pick up [phv] - notice
  • a molecule [n] - the smallest fundamental unit of a chemical compound
  • leave behind [phv] - not bring with
  • tell apart [phv] - differentiate

[n] - noun,  [v] - verb,  [phv] - phrasal verb,  [adj] - adjective,  [exp] - expression

triangle Questions

  1. A dog can perceive what happened only an hour into the past through its nose.

  2. Zinka is a search-and-rescue dog.

  3. The "exquisite olfactory device" the speaker mentions is the dog's nose.

  4. Zinka is wearing many sensors.

  5. Smells spread out evenly on a field.

  6. Dogs can differentiate between smells that come from the left and he right.

  7. Humans can differentiate between smells that come from the left and the right.

  8. Dogs' nasal passages are divided into left and right.

  9. When a dog inhales, about half of the air goes into its olfactory recess.

  10. Dogs' olfactory sensory cells are spread out over numerous little passages.

  11. Humans' olfactory sensory cells are spread out over numerous little passages.

  12. Dogs exhale through the front of their nose.

  13. Dogs can sniff about once per second.

  14. Dogs can smell a single molecule left by a human.

triangle Script

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 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 scent isn’t like following a dotted line on a map. Odors don’t spread out evenly. They’re all swirly and twisted around by air currents.

But Zinka’s 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 outdoes 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 back into a special chamber -- called an olfactory recess. Inside there’s an intricate maze of little passages.

Here’s a researcher’s 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.

And when Zinka exhales, the air is blasted out the sides through those slits, so she can take in a fresh sample each time.

First, she gets a sample, something the hiker has worn. Then, she hits the trail, sniffing about 5 times per second. Zinka can pick up the tiny amounts of scent, down to the molecules the hiker left behind, that we would never notice. She can easily tell her apart from other humans, as she finds her way through the maze of trails. Which leads her right to the hiker.

Good girl, Zinka!

Hey there Deep Peeps! We love making stories about the beauty of nature - up close. And if you'd like to see what's going on in our world, come join us over on Patreon. You can meet the Deep Look Team, see what we're working on right now and maybe even pick up a few filming secrets.

And just for fun, here's a playlist of our favorite YouTube channels. Enjoy! English

Mosquito Bites