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Science Quickly

Rains Bring a Microbial Massacre to Chilean Desert

Science Quickly

Scientific American

Science

4.41.4K Ratings

🗓️ 19 November 2018

⏱️ 2 minutes

🧾️ Download transcript

Summary

Freak heavy rainstorms in 2015 and 2017 wiped out many dry-adapted microbes in the Atacama Desert, useful info in the search for life off Earth. Christopher Intagliata reports. Learn more about your ad choices. Visit megaphone.fm/adchoices

Transcript

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0:00.0

This is

0:02.0

is Scientific American 60 Second Science.

0:05.0

I'm Christopher Intagyata.

0:07.0

Yata Kama Desert in Chile is one of the driest spots on Earth.

0:11.0

Sometimes, can't even see any life at all.

0:13.2

As I was a kid, those drives were really boring because there was nothing to see.

0:17.8

Armando Asuustos was born and raised in the Adakama.

0:21.2

He's now an astrobiologist at the Spanish National Research Council's

0:24.8

Center for Astrobiology. And he says with closer inspection, life can be found there.

0:29.7

But you have to take a microscope in order to see microganisms in those dryest places in

0:35.1

the Atacama.

0:36.1

Then in 2015 and again in 2017, freaks storms from the Pacific flooded the Atacama,

0:41.8

10 times the usual amount of rain fell, turning some of the The didn't exactly burst into bloom. I started looking at the microscope, I couldn't see anything.

0:55.0

This is surprising.

0:57.0

I was expecting to see a assume of little things moving all around,

1:00.0

but I couldn't see anything.

1:02.0

In fact, after sampling three of the newly submerged areas his team found only a

1:06.0

quarter of the microscopic species they'd previously isolated in the desert

1:09.8

region perhaps he says because the water killed the rest through a process called osmotic shock.

1:16.4

The cell doesn't have the mechanisms to get all the water that is going into the cell to get

1:21.5

it out. So they just start inflicting like small balloon

1:24.4

until they burst out.

...

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