A2: Microbes in the News

Article: 60,000-year-old microbes found in Mexican mine: NASA scientist

Link: PHYS, https://phys.org/news/2017-02-year-old-microbes-mexican-nasa-scientist.html

Summary: The research team from NASA found some microbes which is 60,000-year-old in the Naica mine in Mexico and revived them. Penelope Boston of NASA’s Astrobiology Institute said that in that mine, they found some crystals and inside of that, they found lots of microbes and viruses and they were alive, but they were locked by the crystal. Naika is the mine region and inside the mine, temperature is so high, so those area is extreme environment. When the researchers conducted research, they wore a spacesuit and an ice bag. Then, those microbes and viruses were picked up. They are really different from other well known microbes in terms of genome. It’s 10% difference between them and some microbes which has the closest genome sequence and this difference is like between humans and mushrooms. Those microbes lay dormant in the layer of minerals. Penelope said they adapted to their harsh environment and this discovery is just an one example how organisms in the earth are strong.

Connections: It’s relate to microbial ubiquitous and some extrememophiles.

Critical analysis: This mine is really hot and dark and nutrient are limited, so for almost all of organisms, it’s absolutely extreme environment. However, some microbes and viruses can exist in those environment. I was surprised when I read this article, but I am wondering why genome became different from others due to living inside crystals? This article said they are different like human to mushrooms. However, human and mushrooms are completely different from the shape, complexity, habitat and foods etc and they are microbes, but genome is different at 10%, so I’m confused.

Question: How to survive in the crystal even they can’t move? Why they are totally different from other microbes in terms of genome?

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