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Discovery

Metamorphosis: Jumping fleas and mighty mouthparts

Discovery

BBC

Science

4.31.2K Ratings

🗓️ 4 September 2023

⏱️ 28 minutes

🧾️ Download transcript

Summary

Dr Erica McAlister uncovers a treasure trove of remarkable insects from the humble flea whose jump enables them to fly without wings and the mystery of the hawkmoth’s tongue, whose varying length has offered the simplest and most effective proof of Charles Darwin's theory of natural selection in action.

Producer: Dr Adrian Washbourne Presenter: Dr Erica McAlister

(Photo: Dr Erica McAlister. Credit: Dr Erica McAlister)

Transcript

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0:00.0

Before you listen to this BBC podcast, I'd like to introduce myself.

0:03.6

My name's Stevie Middleton and I'm a BBC Commissioner for a load of sport podcasts.

0:08.1

I'm lucky to do that at the BBC because I get to work with a leading journalist, experienced

0:12.2

pundits and the biggest sport stars.

0:14.3

Together we bring you untold stories and fascinating insights straight from the players'

0:18.5

mouths.

0:19.5

But the best thing about doing this at the BBC is our unique access to the sport world.

0:24.9

What that means is that we can bring you podcasts that create a real connection to

0:28.8

dedicated sports fans across the UK.

0:31.1

So if you like this podcast, head over to BBC Sounds where you'll find plenty more.

0:36.0

Unexpected Elements is the podcast shining a light on the science lurking behind the news.

0:41.4

We know lots of scientists and we're not afraid to call them up.

0:45.1

Unexpected Elements from the BBC World Service find it wherever you get your BBC podcasts.

0:52.8

This is Discovery from the BBC World Service and I'm exploring two stories each week of how

0:58.3

insects have transformed our world.

1:03.0

So I'm holding here, as one does, holding a chicken's head, it's in a jar.

1:10.8

They're perfectly preserved jar and it was collected in Sri Lanka in 1907 and the eye is still there

1:17.4

looking at you, but surrounding it in the eyelids are hundreds of tiny little fleas.

1:24.2

Over 80% of described animals on our planet are insects and yet their

1:31.5

appearances can seem as alien or as strange as many a mythic beast.

1:37.6

But some of us who study these wondrous species both now and in the past

1:42.0

have discovered a treasure trove of remarkable insights, insights that have increased our knowledge

...

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