Ancient Mars Could Have Supported Life 81
sighted writes "NASA is announcing that analysis of a rock sample collected by the Curiosity rover shows ancient Mars could have supported living microbes. Scientists identified sulfur, nitrogen, hydrogen, oxygen, phosphorus and carbon in the powder Curiosity drilled out of a sedimentary rock near an ancient stream bed in Gale Crater last month. The announcement quotes Michael Meyer, lead scientist for NASA's Mars Exploration Program: 'A fundamental question for this mission is whether Mars could have supported a habitable environment. From what we know now, the answer is yes.'"
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I'll take it!
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'Could' isn't the same as 'did' (Score:5, Insightful)
Re:'Could' isn't the same as 'did' (Score:5, Insightful)
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"Could" have approaches infinity while "did" is basically finitely linear. There has even been some speculation in the past re: missing fifth planet, Mar's potential former water and atmosphere, the earth's moon and legends of the great flood all potentially "could" be related, all or in part.
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It isn't even confirmation, just additional evidence of what we already suspect and have some proof of.
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Mars could have had a Slashdot website with editors who filtered out stupid articles.
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No, that isn't even possible on Earth.
Re:'Could' isn't the same as 'did' (Score:5, Funny)
'Could' isn't the same as 'did'. I can speculate just as well as the next slashdotter. Mars could have done all sorts of things.
Whew, good thing we had you to point that out for us!
Mars chose Austerity over Life (Score:2)
Ancient Mars decided to go down the Austerity path, and thus life never progressed and never got out of the dinosaur age.
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So Mars evolved republicans...
Commies, surely.
Re:Mars chose Austerity over Life (Score:4, Funny)
So Mars evolved republicans...
Commies, surely.
Well, they do call it the Red Planet.
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Re:Mars chose Austerity over Life (Score:4, Funny)
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Republicans don't evolve. They are intelligently designed.
Around about the same time god "designed" ebola and those horrible eye-worms that infest people in parts of africa. The old dude in the sky was in bit of a misanthropic mood that day presumably,
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Interesting.
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Yep. John Carter knew 'em as "White Martians", who preyed on the rest of the Martians for millenia....
And to the idiot who commented about the "red planet" being commies, may I point out that for the last 13 years in the US, for some mind-bogglingly stupid reason, the right wing has been labeled "red state". Now, unless they're claiming to be Stalinists, I'd say the color's wrong....
But with climate change deniers there, why not send all the Republicans to the place they want to make Earth for us: Venus....
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Nope, they reduced health care costs. To zero.
Zero sum game.
Comment removed (Score:5, Funny)
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We should make a game of it. The winner gets to destroy Mars.
Oh.
Wait.
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Ancient Mars decided to go down the Austerity path, and thus life never progressed and never got out of the dinosaur age.
Not really, they had politicians just like this planet and look what happened. In fact, or not, they are probably the same politicians exploiting the next planet du jour.
In other news... (Score:5, Funny)
Morgan Fairchild could have made mad passionate love to me last night as my house supports an environment an actress could survive in. Geez, I thought that article on Panspermia was bad...
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Morgan Fairchild could have made mad passionate love to me last night as my house supports an environment an actress could survive in.
I suppose she could...but if course, she didn't.
After all, she is my wife!
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He could have picked Morgan Freeman.
Morgan Fairchild (Score:2)
In her day, she was quite a beauty. The plastic surgery on the breasts later on was really sad, but hey, some people like that for some reason that's completely eluded me.
One of her interests is paleontology... that beats the heck out of a number of others one might run into...
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Yeah, really. I find breast enlargements sad, pitiful -- on their best day. It's not breast. It's salt water or silicone. Furthermore, the common nerve damage that makes it so the lady can't feel things properly... that's just appalling; now you have fakes that don't even work other than to hold up clothes. I recognize in the abstract that people *do* like them, I just don't get it at all.
It's not a matter of not liking it when a lady gilds the lily -- I like evening makeup, lingerie, dresses, etc -- but da
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that's like saying the fact that a woman COULD have a baby isn't important unless she DOES have a baby. but it is important, because men CAN'T.
this isn't a bad article at all. in fact it's huge news. KNOWING mars could have supported life is better than WONDERING if it could have. we now have evidence that life might once have existed on mars. we didn't know that before.
Nothing new (Score:1)
So after all that money spent on rovers, scientists still can't tell us something we don't already know?
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So after all that money spent on rovers, scientists still can't tell us something we don't already know?
Maybe scientists should have spent all the money on fake boobs?
Re:Nothing new (Score:4, Informative)
So after all that money spent on rovers, scientists still can't tell us something we don't already know?
From the second paragraph of TFA: "Scientists identified sulfur, nitrogen, hydrogen, oxygen, phosphorus and carbon -- some of the key chemical ingredients for life -- in the powder Curiosity drilled out of a sedimentary rock near an ancient stream bed in Gale Crater on the Red Planet last month."
That's something we didn't already know. Don't mistake your own inability to read the article for a shortcoming on NASA's part.
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Yes, that money could have better spent blowing up another hut filled with men, women and children in the Middle East.
I'm being sarcastic.
Please read TFA, the key part is:
Scientists were surprised to find a mixture of oxidized, less-oxidized, and even non-oxidized chemicals, providing an energy gradient of the sort many microbes on Earth exploit to live. This partial oxidation was first hinted at when the drill cuttings were revealed to be gray rather than red.
If you know of another, cheaper way to know this I'm all ears.
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No, we didn't already know this. Prior to this it was perfectly feasible that in fact Mars COULDN'T have supported life.
Now that we know that Mars still COULD have supported life, there is even more reason to keep looking for evidence of it, because the possibility remains.
You can see it in the rock. (Score:5, Interesting)
If you just look at the photo [nasa.gov] of the powdered rock sample, you can see it doesn't look dusty red, like soil samples and rocks from elsewhere on Mars [nasa.gov]. The red is hematite, a sign of high-oxidation. The grey of Gale Crater says right away that this environment is different, less-oxidized, and probably also a good deal less acidic.
that's a lot of money and effort for a maybe. (Score:1)
:|
Re:that's a lot of money and effort for a maybe. (Score:5, Insightful)
From such maybes come later conclusions likely a good bit more concrete. Exploration and the resulting science is a process; it's not very smart to take a point in midstream and bitch about it. Don't hold your breath, go about your life, and eventually you'll catch notice of something that wows you, or enables your technology, etc.
Everyone knew that already (Score:4, Insightful)
Granted, this *is* confirmation that the possibility requires fewer additional variables than it would've without the findings, which is decent news, though not overly exciting. Still, I've read great speculative but not overly soft scifi in which life was found was found in a gas giant (Manta's Gift), even in a freaking star (Dragon's Egg). Almost anywhere *could* have supported life, for some definition of life.
Dang it, Capitalism (Score:2, Offtopic)
Of course Mars supported life... until capitalism killed it. [reuters.com]
Could have been.... (Score:5, Interesting)
Could have been....
One aspect of the possibility of life on Mars that is rarely discussed is the fact that there are still a couple of other characteristics of Mars in it's current state that preclude life, as we know it--a lack of a strong magnetic field and the permanent sequestration of CO2 in the ground.
Mars is dead. The core of Mars has long since cooled, leaving it with a much thicker solid mantle then Earth currently has. It may have similar "ingredients" to Earth, but those ingredients on Mars have stopped flowing--much of the magnetic field on Earth is a result of not only the ferrous content, but the motion of that content within the Earth, motion that can only occur in non-solids.
Why is this important? Without a swirling interior, you have a much weaker magnetic field protecting the planet from solar radiation, radiation that is harmful to life. Another more important aspect is the effect of a magnetic field in terms of solar pressure (the same pressure that propels a "solar sail") on the atmosphere of Mars. Here on Earth, our magnetic field counters that pressure from solar winds and literally keeps our atmosphere from "blowing" away. There are other things that keeps our atmosphere around (ha!), like gravity, but protection from solar pressure is important--the solar pressure exerted on Mars is greater then the countering effect generated by Mars' magnetic field.
There is nothing to keep Mars' atmosphere from blowing away.
http://www-ssc.igpp.ucla.edu/personnel/russell/papers/mars_mag/ [ucla.edu]
All of that being said, any CO2 released from the ground--CO2 that would create a greenhouse effect--doesn't stay in the atmosphere. The idea of Terra-forming Mars wouldn't work--we could bring the entire atmosphere of Earth along with us to Mars and it would simply blow away into space.
But, Tardigrades have survived in space a very long time...
http://en.wikipedia.org/wiki/Tardigrades [wikipedia.org]
Re: Could have been.... (Score:5, Interesting)
Right, but if Mars was one warm and squishy, then it gradually cooled off and hardened internally.
So each successive generation would have selective pressure to survive a slightly lower temperature, a slightly weaker em field, a slightly more hostile environment. That's happening in geological time, and it's perfect for an evolutionary development of a species that could survive there.
It's unlikely though, and until they see fossils or movement, then it's still just potential. If we all lived up to our potential half of us would be living in space.
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the core would come to life again if we simply start the reactor.
the Cohagen and his corporate interests wont let that happen.
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Well, of course Mars used to support life (Score:1)
and if the Holy Therns had left the atmosphere plants alone, it still would.
why the preoccupation with Mars (Score:1)
Ancient Mars Could Have Supported Life (Score:1)
A good argument for terraforming (Score:2)
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In the case of Europa, it's obvious, unless the phrase "Attempt no landings there" isn't clear enough for you!
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Breaking news from NASA (Score:2)
It could right now. (Score:4, Interesting)
As far as we know their is life under the ice right this moment, where their might be large lakes or seas of liquid water. This life could even be fish like.
Hell we have bacteria living in ice on earth, we might find the same thing there.
Mars was very earth like far before Earth became more than a ball of molten rock and metal. If life is at all common, it probably had it, as it probably had about the same chances of it forming.
Science and media (Score:3)
I think for common crowd and media it is quite frustrating: "didn't we already know that?". Well, for scientists to "know" isn't enough - they need evidence, facts, proof. Now proof just become much stronger.
I personally think that acknowledgment of "could have supported" is enough for me to be excited. I still in doubt and I think Mars probably didn't have any bacteria floating around, but it shows that scenario for setting up reasonable good odds for life isn't that unique. Yes, you need strong magnetic field aka natural protection from particle bombardment. Yes, life need to survive heavy artillery - like meteoroids, dino killers, etc. But still...
Also this is huge from supporting human colony there. Strange that no one here talks about that.
Again (Score:2)
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Panspermia is part of a shell game. (Score:2)
They are just shifting the cups around on the table without explaining a damn thing. What they should do is just admit that they don't know instead of creating even more convoluted "theories"