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Science Magazine Podcast

The age-old quest for the color blue and why pollution is not killing the killifish

Science Magazine Podcast

Science Podcast

News, News Commentary, Science

4.3842 Ratings

🗓️ 2 May 2019

⏱️ 29 minutes

🧾️ Download transcript

Summary

Humans have sought new materials to make elusive blue pigments for millennia—with mixed success. Today, scientists are tackling this blue-hued problem from many different angles. Host Sarah Crespi talks with contributing correspondent Kai Kupferschmidt about how scientists are looking to algae, bacteria, flowers—even minerals from deep under Earth’s crust—in the age-old quest for the rarest of pigments. Also this week, host Meagan Cantwell speaks with Andrew Whitehead, associate professor in the department of environmental toxicology at the University of California, Davis, about how the Atlantic killifish rescued its cousin, the gulf killifish, from extreme pollution. Whitehead talks about how a gene exchange occurred between these species that normally live thousands of kilometers apart, and whether this research could inform future conservation efforts. This week’s episode was edited by Podigy Download the transcript (PDF) Ads on this show: KiwiCo Listen to previous podcasts. About the Science Podcast 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.

0:44.0

Welcome to the science podcast for May 3rd, 2019. I'm Sarah Crespi. In this week's show, we're back with the latest stories from science.

0:55.2

First up, I'm going to talk with contributing correspondent Kai Kupershmet about how humans

1:00.5

have been trying for millennia to make the color blue and about some recent successes.

1:08.3

And Megan Cantwell talks with Andrew Whitehead about how a small fish in the Gulf of Mexico,

1:14.4

the Gulf killy fish, has adapted to pollution with the help of its Atlantic cousins genes.

1:23.3

First up, we have contributing correspondent Kai Cooper Schmidt. He's here to talk to us about

1:28.1

the pursuit of blue. Hi, Kai. Hi, Sarah. So how long have humans been on the hunt for a blue

1:35.8

color? That's already where the difficulty begins, I guess. Yeah. There's pretty good evidence

1:40.6

from a cave in South Africa, the Blombus Cave, that 100,000 years ago,

1:45.2

humans already were making pigments, so more like red ochre and yellow ochre and using charcoal for

1:51.3

black. They were making pigments, but there's no evidence at all of any blue pigments. And for a

1:56.7

very, very long time, that stays the same. I mean, there's some recent evidence from a grave site in

2:03.2

Turkey that about 9,000 years ago, there were some burials of women and children where they had

2:09.3

ground down azurite, which is a blue mineral. And even when it's ground down, it's kind of a nice

2:14.1

blue pigment. They were buried with this. Possibly it was used for cosmetics.

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