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originally posted by: jeep3r
a reply to: Wildmanimal
I think it's safe to say that we're not going to hear anything from NASA with regards to life on Mars. They seem to avoid astrobiology like the plague.
originally posted by: WideOpenSpace
Doesn't Curiosity have a SAM (Sample Analysis at Mars) module, which can be used to put the speculations to rest?
Mars covered in toxic chemicals that can wipe out living organisms, tests reveal
The chances of anything coming from Mars have taken a downward turn with the finding that the surface of the red planet contains a “toxic cocktail” of chemicals that can wipe out living organisms.
Experiments with compounds found in the Martian soil show that they are turned into potent bactericides by the ultraviolet light that bathes the planet, effectively sterilising the upper layers of the dusty landscape.
Wadsworth’s research was driven by the discovery of powerful oxidants known as perchlorates in the Martian soil some years back. Hints of perchlorates first showed up in tests performed by Nasa’s Viking lander missions 40 years ago, but were confirmed recently by the space agency’s Phoenix lander and Mars rover, Curiosity.
In 2015, the Mars Reconnaissance Orbiter spotted signs of perchlorates in what appeared to be wet and briny streaks that seeped down Martian gullies and crater walls.
Further tests found that the UV rays broke down the perchlorate into other chemicals, namely hypochlorite and chlorite, and it is these that appear to be so destructive to the bacteria.
The scientists followed-up with another round of experiments that looked at the toxic effects of iron oxides and hydrogen peroxide, which are also found in Martian soil. These tests yielded even more bad news for microscopic Martians: when the bacteria were hit with UV rays in the presence of perchlorates, iron oxide and peroxide, the bugs were killed 11 times faster than with perchlorates alone. Writing in Scientific Reports, the researchers say that the inhospitable conditions on Mars are caused by a “toxic cocktail of oxidants, iron oxides, perchlorates and UV irradiation.”
originally posted by: ArMaP
a reply to: jeep3r
Thanks for that.
So, how can I trust the work of people that publish a scientific paper and get the identification of two photos wrong, pointing to sol 820 when it was from sol 890?
Nora Noffke, a geobiologist at Old Dominion University in Virginia, has spent the past 20 years studying these microbial structures. Last year, she reported the discovery of MISS that are 3.48 billion years old in the Western Australia’s Dresser Formation, making them potentially the oldest signs of life on Earth.
In a paper published online last month in the journal Astrobiology (the print version comes out this week), Noffke details the striking morphological similarities between Martian sedimentary structures in the Gillespie Lake outcrop (which is at most 3.7 billion years old) and microbial structures on Earth.
originally posted by: LookingAtMars
Because everyone makes mistakes.
There is still a lot of good information in the paper. I think a lot of what is in the paper could turn out to be fact.
originally posted by: Blue Shift
originally posted by: wildespace
The most important thing is that these are funky fungi.
Hard to say. I still can't quite figure out what this thing is:
Maybe it's some of that funky fungi, too.