Slashdot Mirror
Brine on Mars?
Bagels writes "A new article on MSNBC (coming originally from Space.com) reports that the both Rovers may have struck water in the form of brine. The Opportunity rover found hints of salty water in the trench that it dug, and scientists note that the Spirit rover is currently digging a trench of its own to investigate the soil that clings to its treads, suggesting the possibility of moisture. The brine would only be small amounts of water mixed with salt, which can exist in liquid form at very low temperatures. More images are available over at NASA's rover site." Reader
frovingslosh would like to add: "I'm just hoping that when you get around to posting one of the many stories that the rover has found mud on Mars that you might include a link to the slashdot article where I predicted this but got moderated as 'funny'." Done!
Jokes, aside, let's not forget that this could house some microbial life, at the very least. Just look at our ocean's seabed around the vents.
No, the ice caps have been known to be largely water ice for a while now. There was another story confirming it a few weeks ago. The real news here is liquid water.
If it's not on fire, it's a software problem.
Great findings, but it seems somewhat obvious that there can't be clean fresh, salt-free water on mars if the hypthesis that most of it evaporated away is true.
Else, all the rocks would only contain non water-soluble materials - hard to imagine.
Speculation: The salt content of the water is probably be linked to the water content in atmosphere. The average evaporation rate for the brine into the atmosphere should match the rate of hygroscopic attraction of water from the atmosphere.
Even if the water DID evaporate, it would not, "move into outer space." There's this thing called gravity, which works on the molecules of gas-phase matter just as much as it works on liquids. The air doesn't "move into outer space," does it? The vapor would rise until it found equilibrium with other atmospheric gases. If there was a lot of water, you'd see it in the form of clouds.
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The opportunity costs are too high for this to be feasible. If we're throwing 500 pounds of anything at Mars, it's going to be a little more sophisticated then a hunk of inert metal.
This would be a feasible experiment if slinging 500 pounds of material around the Solar System were something we could do causually, so it's not like it's a bad idea, but at our present stage of development, we'd want that 500 pounds to be probes and satellites and sensors and such that are more useful for making things other then holes.
I really wish that the majority of global space efforts would go towards designing and constructing a space elevator already. This is really what they need in order to get things rolling in outer space. The major hurdle is getting anything we construct here on earth off the surface, past the atmosphere and out past orbit....If a successful implementation of space elevator were to exist we could simply raise our payloads out past the atmoshere and snap together prebuilt space cruisers in space. Then we could really have some serious space travelling. Unt il then we will just piddle around with the Xprize and trying to get chunks of metal off the earth's surface....we're still stuck in our sandbox with our pale and shovel...how depressing. If only more effort and funing were to go toward space instead of missiles and chem weapons, etc...sigh.
Dry stuff. Wiggle. Rub. Static. Clumping?
Also, someone asked "if you took an earth extremeophile and plonked it mars, what would happen".
It might burst and die. It might dry out and die. It might use its energy reserve and die. Its innards might freeze and die. Its DNA and proteins might get fried by the radiation and die. (Notice how many of these involve the word "die"?).
There are one or two genera that might just have time to kick their sporolation apparatus into action and retreat their important bits (mostly tightly packed DNA) into a dry, tough husk. But thats as good as its going to get I would think.
I wish at was Friday, but I dont want to wish my life away. So I wish it was last Friday.
There are a couple faults in your analysis about the possibility of life on Mars.
The first is your statement about life being aggressively pervasive. This is only true in one sample that that we know about, Earth. We have no idea whether there are other types of life that are either not aggressively pervasive or pervasive but not not easily detected.
Second, there are areas, even on Earth, where life is existent but not aggressively pervasive. Ocean floor thermal ducts and the interior of Antarctica being notable examples. So, from even our limited sample, one could draw the conclusion that the aggressiveness and pervasiveness of life is proportional to the hospitableness of the environment. From that one would expect any life that exists on Mars to be very difficult to find.