Brines on Mars may not be habitable

Brines on Mars may not be habitable”

"Our results indicate that (meta) stable brines on the Martian surface and its shallow subsurface (a few centimeters deep) are not habitable because their water activities and temperatures fall outside the known tolerances for terrestrial life", the researchers wrote in the study's abstract.

"We used Martian climate information from both atmospheric models and spacecraft measurements".

On Earth, salt loving (halophilic) and cold loving (psychrophilic) microbes populate the kind of habitats that occur on Mars, prompting some scientists to ask whether these transient liquid water environments could be hospitable for life on the Red Planet.

On modern Mars with an average temperature of - 40o C water is only in the deposits of ice and a small amount of vapor in the atmosphere. These results were published this month in Nature Astronomy. One of the researchers, Dr. Alejandro Soto, explained the team's process in coming to that conclusion by analyzing certain parts of Mars "where liquid water temperature and accessibility limits could possibly allow known terrestrial organisms could replicate - to understand if they could be habitable".

A wide range of salts have been detected on Mars, with carbonate and sulfate salts being the most abundant.

More news: Google Pixel 4a expected in June alongside Android 11 reveal

"In my opinion, and that of the science community, the chance that rocks from Mars that are millions of years old will contain an active life form that could infect Earth is extremely low", Hubbard said.

Researchers found that the temperature of the Martian saltwater is quite low for life to thrive.

The presence of brines was spotted for the first time with the help of dark streaks, which were captured by NASA's Mars Reconnaissance Orbiter. However, it can not go past the six-hour mark, as the brines by that time will have a maximum temperature of 48 degrees Celsius.

They found that brine formation from some salts can lead to liquid water over 40% of the Martian surface but only seasonally, during 2% of the Martian year. While the presence of clay supports the notion Mars may have once had water, it doesn't conclusively prove the planet harbored conditions for life. "We needed to know the seismic properties of the iron-sulfur alloy thought to make up the core of Mars". Before working as director of NASA Ames, Scott Hubbard said he is genuinely concerned that samples of Mars rocks that will be collected in the future have the potential to bring in alien viruses from the Red Planet, so they should be analyzed and quarantined., like the astronauts who brought them.

Rivera-Valentín said: "In our work, we show that the highest temperature a stable brine will experience on Mars is -48°C".

Like this



14 May 2020
Coronavirus: EFL clubs told not to train until May 25
Clubs in the second to fourth tiers of English soccer should not return to training before May 25 amid the Covid-19 pandemic, the English Football League (EFL ) said on Wednesday (May 13).

14 May 2020
Kurtley Beale leaving for France, but maintains Wallabies eligibility
Beale, now 31 has played 92 Tests to comfortably pass the 60-cap limit required to play for the Wallabies while plying his trade overseas.

14 May 2020
West Indies players will be 'very nervous' about England tour
He was hopeful that both England and Australia will tour Pakistan for their scheduled series in 2021 and 2022 respectively. The West Indies were to tour England in June but their three-Test series has been postponed.

14 May 2020
Manchester United To Complete Triple Transfer Swoop?
Gomes is understood to have increasingly grown unsettled at United after discussions over a new deal with the club broke down. United now have Anthony Martial, Marcus Rashford, Mason Greenwood and Odion Ighalo (on loan), who can play up front.

14 May 2020
United States accuses China of stealing research data
The announcement represents an escalation in USA efforts to combat Chinese espionage and cyber-attacks. The alert did not contain specific threat intelligence or name any hacking groups.

14 May 2020
U.S. stocks tumble as Fed chief warns downturn may be long
The Labor Department said on Wednesday the USA producer price index fell 1.3% in April after slipping 0.2% in March. West Texas Intermediate crude rose 0.1% to $25.32 a barrel.Gold was at $1,714.25 an ounce, little changed.

14 May 2020
Dele Alli robbed at knifepoint after home intrusion
Alli is now waiting to return to training with his Spurs teammates before a proposed Premier League return in late June. Alli did not require hospital treatment and there have been no arrests yet, with the investigation still ongoing.

14 May 2020
Clark County jumps to 393 COVID-19 cases
The DuPage County Health Department Wednesday reported 117 new cases of COVID-19 in the county, including 10 deaths. Nine people are hospitalized for coronavirus in Clark County, and three people are in an intensive care unit.

14 May 2020
AG Nessel issues formal opinion regarding guns at the State Capitol
It ended early due to racist and threatening messages posted in Zoom, which was how the public could watch and make comments. They can carry a concealed pistol with a permit unless in schools, day care centres and other specified places.

14 May 2020
Inflammatory disease shows up among young Missouri patients
Monday, Governor Andy Beshear announced a 10-year-old child in Kentucky has the syndrome and is now on a ventilator. Cases of these rare inflammatory illnesses in children were first reported in Britain, Italy and Spain.