The Curiosity rover is currently on its way to Mars, scheduled to make a dramatic landing within Gale Crater in mid-August and begin its hunt for the geologic signatures of a watery, life-friendly past. Solid evidence that large volumes of water existed on Mars at some point would be a major step forward in the search for life on the Red Planet.
But has it already been found? Some scientists say yes.
Researchers from universities in Los Angeles, California, Tempe, Arizona and Siena, Italy have published a paper in the International Journal of Aeronautical and Space Sciences (IJASS) citing the results of their work with data obtained by NASAs Viking mission.
The twin Viking 1 and 2 landers launched in August and September of 1975 and successfully landed on Mars in July and September of the following year. Their principal mission was to search for life, which they did by digging into the ruddy Martian soil looking for signs of respiration a signal of biological activity.
The results, although promising, were inconclusive.
Now, 35 years later, one team of researchers claims that the Viking landers did indeed detect life, and the datas been there all along.
Active soils exhibited rapid, substantial gas release, the teams report states. The gas was probably CO2 and, possibly, other radiocarbon-containing gases.
By applying mathematical complexities to the Viking data for deeper analysis, the researchers found that the Martian samples behaved differently than a non-biological control group.
Control responses that exhibit relatively low initial order rapidly devolve into near-random noise, while the active experiments exhibit higher initial order which decays only slowly, the paper states. This suggests a robust biological response.
While some critics of the findings claim that such a process of identifying life has not yet been perfected not even here on Earth the results are certainly intriguing enough to bolster support for further investigation into Viking data and perhaps re-evaluate the historic missions inconclusive findings.
The teams paper can be found here.
Explore further:
Could Curiosity determine if Viking found life on Mars?
deatopmg
Photo's from Viking 1 & 2 seem to show higher life forms too.
What do NASA/JPL/MSSS really know?
SoylentGrin
Shoss
SoylentGrin
"Mars Science Lab, nicknamed Curiosity, isn't a life-detection mission like Viking. Rather, it is intended to chemically analyze the landing site known as Gale Crater for habitats that could have supported life, or possibly still can."
Stop looking around the edges, NASA, and just send a freaking microscope!
SoylentGrin
pauljpease
There is no such thing as a "conclusive" negative result. If they sent the best possible equipment almost guaranteed to detect life if it was present, and it still didn't detect any, that still would not be conclusive proof that there is no life on Mars. Maybe they were just looking in the wrong crater, or not deep enough in the soil, etc. I'm a scientist and right now I am acutely aware of the difficulty of negative results, my experiments all show that the proteins I'm studying DON'T do something, which is essentially meaningless because since they don't do anything I can't say anything conclusive. Maybe I'm just doing the experiment wrong, or a reagent is not working properly, etc.
SoylentGrin
I guess what I'm lamenting is that although you can't prove a negative, you could prove a positive result. A microscope could conclusively verify a positive result, but would not rule out the existence of life if a negative result came up. (wrong sample, etc.)
What they have are experiments that could hint at past or present life, but nothing to confirm it, even if the results of the tests all point 100% to the existence of life. It seems silly to NOT include a test that could conclusively verify the existence if all results point that way, especially if the equipment to verify a result could be put to use in other ways as well.
baudrunner
Jonseer
Anda
Sure! I see clearly a rose elephant and a flying donkey in this photo :)
Conspiracy! Obama is a martian!
Vendicar_Decarian
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"In spite of this interesting finding, the question remains: Why hasn't NASA sent ANY followup but far more advanced life detecting technology to Mars in the past 35 years??" - Klamdopatforniplotz
Milou
evropej
We are not doing much of anything thanks to the oblabla administration shutting space programs down. Like they said, wait for some private company to do this research now. You know, the kind of company which outsources all the work to low cost countries. We are going to space and beyond with those bean counters in charge. The change brought a bright future to this country.
Sinister1811
StarGazer2011
@Vendicar: Spirit, Opportunity and Phoenix all could have carried these experiments; its not $.
alfie_null
la7dfa
Put the blame where it belongs, and stop watching FAUX news.
The cost of the wars in Iraq and Afghanistan alone is more than 200 annual NASA budgets.
rwinners
Yep. It's called insured funding.
sirchick
Perhaps they should microscope their own robots once it lands it would not surprise me if a tiny spec of bacteria made it to Mars.. weather it survived and is still alive is not quite so likely but not impossible.
Musing AboutStuff
Seriously, though, this is an important question. @sirchick, bacterial contamination is possible, but I figure they would do everything possible to sanitize the vehicle.
But you're right, it is possible so as a backup they probably (or should have) included some provision for detecting earth-based contamination. Honestly I don't even know if such testing is possible once the craft is at Mars. Even so, it seems that practically speaking they would focus on ensuring that the soil collection part was as pristine as possible and could collect as much soil as possible. It's doubtful that a bacterial contamination from Earth would be so big that it would mess with a sizable soil sample right on the Martian surface.
I am curious to see what Curiosity finds.
rwinners