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The Life Scientific

Matthew Cobb on how we detect smells

The Life Scientific

BBC

Technology, Personal Journals, Society & Culture, Science

4.61.4K Ratings

🗓️ 3 March 2020

⏱️ 31 minutes

🧾️ Download transcript

Summary

It’s been estimated that humans are capable of detecting a trillion different smells. How is this possible when we have just 400 types of olfactory receptors located in the bridge of our nose? Matthew Cobb has spent many years studying maggots hoping to get to bottom of this problem. He spent several years studying the flirting rituals of fruit flies in Sheffield before moving to France to study at the world centre for fly research, not far from Paris. There are, of course, a lot of differences between maggots and humans but our olfactory systems have a lot in common. Producer: Anna Buckley

Transcript

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0:00.0

You're about to listen to a BBC podcast and trust me you'll get there in a moment but if you're a comedy fan

0:05.2

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0:24.4

subjective and everyone has different tastes so we've got a huge range of comedy on offer

0:29.6

from satire to

0:33.7

silly, shocking to soothing, profound to just general pratting about. So if you fancy a laugh, find your

0:37.9

next comedy at BBC Sounds.

0:40.0

Hello, I'm Jim Arkelili and this episode of the Life Scientific is all about our sense of smell.

0:47.0

Before we start, I'd like you all to have a good sniff around.

0:51.0

Maybe start with your clothes. Do you recognize the detergent you use?

0:54.7

And what about the objects in front of you? Your mobile phone? The radio? You get the

0:59.6

idea there are lots of different smells out there. In fact, the latest estimates suggest that we

1:04.9

humans are capable of detecting more than a trillion different smells.

1:10.1

My guest today, Professor Matthew Cobb, wants to know how this is possible.

1:14.3

But understanding the mechanics of smell in humans is too complex,

1:19.4

so he studies fruit flies instead, and he spent a lot of time watching maggots move across petri dishes.

1:26.3

But before you pigeonhole him as a narrowly focused scientist, perhaps I should also

1:30.9

point out that Matthew has written several books on French history,

1:34.4

the history of genetics and most recently the brain.

...

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