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Science Magazine Podcast

An oasis of biodiversity a Mexican desert, and making sound from heat

Science Magazine Podcast

Science Podcast

News, News Commentary, Science

4.3842 Ratings

🗓️ 2 July 2020

⏱️ 23 minutes

🧾️ Download transcript

Summary

First up this week, News Intern Rodrigo Pérez-Ortega talks with host Meagan Cantwell about an oasis of biodiversity in the striking blue pools of Cuatro Ciénegas, a basin in northern Mexico. Researchers have published dozens of papers exploring the unique microorganisms that thrive in this area, while at the same time fighting large agricultural industries draining the precious water from the pools. David Tatnell, a postgraduate researcher at the University of Exeter, talks with host Sarah Crespi about using heat to make sound, a phenomenon known as thermoacoustics. Just like the sound of fire or thunder, sudden changes in temperature can create sound waves. In his team’s paper in Science Advances, Tatnell and colleagues describe a thermoacoustic speaker that uses thin, heated films to make sound. This approach cuts out the crosstalk seen in mechanical speakers and allows for extreme miniaturization of sound production. In the ultrasound range, arrays of thermoacoustic speakers could improve acoustic levitation and ultrasound imaging. In the hearing range, the speakers could be made extremely small, flexible, and even transparent.  This week’s episode was produced with help from Podigy. Listen to previous podcasts. About the Science Podcast  ++ [Image: David Jaramillo; Music: Jeffrey Cook] Authors: Meagan Cantwell; Rodrigo Pérez-Ortega, Sarah Crespi Learn more about your ad choices. Visit megaphone.fm/adchoices

Transcript

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0:00.0

Morgan State University, a Baltimore, Maryland Carnegie R2 doctoral research institution,

0:05.0

offers more than 100 academic programs and awards degrees at the Baccliorate, Masters, and Doctoral Levels,

0:12.0

is furthering their mission of growing the future leading the world.

0:16.0

Morgan continues to address the needs and challenges of the modern urban environment.

0:20.0

With a four-year quadrupling of research, more than a dozen new doctoral programs,

0:25.7

and eight new National Centers of Excellence, Morgan is positioned to achieve Carnegie R1 designation in the next five years.

0:33.7

To learn more about Morgan and their ascension to R1, visit morgan.edu slash research.

0:46.3

Welcome to the science podcast for July 3, 2020.

0:49.7

I'm Megan Cantwell.

0:51.2

First up this week, I speak with news intern Rodrigo Perez-Otega about an

0:55.6

oasis of biodiversity in the Mexican desert. Next, we have researcher David Patnell. He talks with

1:01.6

host Sarah Crespi about a thermo-acoustic speaker, a device that uses heat to create sound.

1:11.4

I'm here with news intern Rodrigo Perez-Ortega, who is taking us to one of the most

1:16.2

biodiverse places in the world, Quattro Cienegas, a basin nestled in between the mountains

1:22.3

of northern Mexico.

1:24.0

Thank you so much for joining me, Rodrigo.

1:25.8

Thanks for reminding me, Megan.

1:27.2

Despite not being able to travel to Quattro Cienagas, you were still able to get a really good sense of place based on all of the maps, photos, videos, and interviews with researchers. What exactly is this basin like? So imagine you arrived there in the middle of the desert and there's this butterfly-shaped basin.

1:46.6

They call it a butterfly. It's basically this valley that is cut in the middle with a mountain called San Marcosipinos.

1:54.0

And that's what keeps the butterfly shape.

1:56.2

But also what's really interesting is you have all these pools, more than 300 pools of clear blue turquoise water and also rivers and lagoons.

2:07.6

That's why it's called an oasis in the middle of the desert.

...

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