Add to favourites
News Local and Global in your language
22nd of November 2017

Science



Experiment on Earth suggests microbes could survive on Mars

Nov. 9 (UPI) -- To better understand the limits of survival in our solar system and beyond, researchers exposed microbial communities to conditions replicating the harsh environment found on Mars. The microbes were surprisingly resilient.

An improved understanding of life's limits can aid scientists as they search for biomarkers and signs of life throughout the solar system.

Mars is cold, with an average temperature of negative 63 degrees Celsius. Its air pressure is also several hundred times less than Earth's and intense radiation, including gamma rays, regularly bombard Red Planet's surface.

Scientists at Lomonosov Moscow State University replicated these harsh conditions in a small chamber in the lab. The test subjects included microbial communities collected from the Arctic permafrost. Researchers also sampled layers of ancient permafrost that haven't melted for 2 million years.

Astrobiologists estimate the sediment layers on Mars act similarly to ancient Arctic permafrost, preserving microbes in a cryo-conserved state.

"In a nutshell, we have conducted a simulation experiment that covered the conditions of cryo-conservation in Martian regolith," Vladimir S. Cheptsov, a post-graduate student at LMSU, said in a news release.

The tests results showed the permafrost microbes were surprisingly resilient. Prokaryotic cells and metabolically active bacterial cells survived as long as the control communities. Cultured bacteria, microbes growing on nutrient media, didn't fair as well.

Researchers were surprised to find significant biodiversity among the microbes in the permafrost exposed to Mars-like radiation. The microbial communities weren't unaffected, however. Their makeup changed as a result of exposure, with certain strains becoming more dominant.

Researchers published the results of their experiments this week in the journal Extremophiles.

"The results of the study indicate the possibility of prolonged cryo-conservation of viable microorganisms in the Martian regolith," researchers wrote. "The data obtained can also be applied to assess the possibility of detecting viable microorganisms on other objects of the solar system and within small bodies in outer space."

Read More




Leave A Comment

More News

Breaking Science News |

All DiscoverMagazine.com

NYT > Science

Latest Headlines | Science

Science | Popular Science

Latest Science News --

Science - The Huffington

Christian Science Monitor |

Nature - Issue - nature.com

Scientific American Content:

Latest News from Science

Science | Smithsonian

Live Science

Science News - UPI.com

Astronomy News – Sky

Space.com

Disclaimer and Notice:WorldProNews.com is not the owner of these news or any information published on this site.