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Short Wave

Against All Odds, The Pumpkin Toadlet Is

Short Wave

NPR

Daily News, Nature, Life Sciences, Astronomy, Science, News

4.76K Ratings

🗓️ 5 July 2022

⏱️ 12 minutes

🧾️ Download transcript

Summary

Being small has its advantages ... and some limitations. One organism that intimately knows the pros and cons of being mini is the pumpkin toadlet.

As an adult, the animal reaches merely the size of the skittle. At that scale, the frog's inner ear is so small, it's not fully functional. That means when the frog moves, it's haphazard and seems kind of drunk. And so today, with the help of Atlantic science writer Katie Wu, we investigate: If a frog can't jump well, is it still a frog?

Read Katie's piece in The Atlantic, A Frog So Small, It Could Not Frog: https://bit.ly/3bydh1g

Watch pumpkin toadlets poorly fling themselves around in this video from the Florida Museum: https://bit.ly/3bFAXRv

Transcript

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0:00.0

You're listening to Shortwave from NPR.

0:07.0

In the cloud forests of the mountains of Brazil, on the rainforest floor, there lives an

0:15.5

itty bitty orange critter called the pumpkin totale.

0:19.4

And I should caveat this with the very important descriptor that it is not a proper toad and

0:25.4

a tot is really kind of a made up thing anyway, but we don't need to get into that.

0:29.3

This is Atlantic writer Katie Wu.

0:31.2

And these things are ridiculously small about a centimeter from nose to butt or snout to

0:37.8

vent as you would say it more formally.

0:39.9

No, to vent.

0:40.9

Okay.

0:41.9

And you can imagine that it is about the size of a skittle or a chickpea.

0:47.1

And newborn pumpkin totals coming at around half a skittle.

0:51.0

They skip right over the whole tadpole thing.

0:53.2

And that means that all along they have some of the tiniest inner ears in any animal.

1:00.3

And like big deal, right?

1:02.5

Well, the inner ear is the home of the vestibular system, which is the thing responsible for

1:07.6

keeping us balanced and moving smoothly.

1:10.3

And so if you think about all of the important structures in your head that help you balance

1:15.5

and help you not fall over when you're just walking from place to place or help you land

1:21.1

a jump when you make a slight hop over the edge of a curb or something, that is all attributable

1:27.4

to your vestibular system.

1:29.9

And that can be traced back to your inner ear.

...

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