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Image captured by Phoenix Mars lander  (Source: NASA)
There have been numerous traces of possible water on Mars, but astronomers are still looking for definitive proof

Researchers believe they have found evidence of liquid salt water on the Red Planet of Mars, with the discovery thanks to the NASA's Phoenix Mars lander.

Several images captured by Phoenix show what appear to be water droplets located on one of the rover's landing struts, which now makes researchers believe there could be liquid water somewhere under the surface of the planet.

"A large number of independent physical and thermodynamical evidence shows that saline water may actually be common on Mars," according to University of Michigan professor Nilton Renno.  "Liquid water is an essential ingredient for life.  This discovery has important implications to many areas of planetary exploration, including the habitability of Mars."

Renno worded his report very carefully, explaining that the discovery has "important implications," but not outright saying it's proof of water liquid.

Although the temperature in the northern plains of Mars didn't go above minus 15 degrees Fahrenheit while the Phoenix was there for a six-month period in 2008, researchers still believe there could be pockets of water under the surface.  The presence of high amounts of salt may have caused the freezing temperature of water on Mars down to minus 90 degrees, which is about 120 degrees colder than Earth's 32 degree freezing temperature for water.

There are numerous spots on Mars that could be salty enough that it's unlikely they'll be able to freeze without the temperature dropping to minus 100 degrees or further, scientists said.

The report is still highly controversial, despite 22 different scientists signing onto the report -- NASA never brought up the discovery, seeing how the evidence may not be enough.

Each discovery of possible signs of liquid water or ice helps researchers hone in on locations space probes and satellites can examine during future missions.



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RE: Please use ISO units
By Murloc on 3/19/2009 3:37:08 PM , Rating: 2
but this site maybe is international, I think they should put SI measures and american measures in brackets.
there isn't a site like this in my mother language, and I fully understand only articles in english or my mother language.

quote:
I'll praise the day when we accept Celsius

I saw this on encarta dictionary: "6. politics proposal of legislation by citizens: a process valid in many US states and in Switzerland that allows citizens to propose legislation by petition "
Why don't you make an initiative to adopt SI measures?
it would be a nice step towards modernization.


RE: Please use ISO units
By theapparition on 3/19/2009 5:06:12 PM , Rating: 2
Because in the US, statewide regulation of units would be illegal. It has to happen at the federal level, since measurement standards are controled at the US government level.

Still, without much popular support, suggesting such legislation would be impractical at best.

I think the far better thing is for companies to adopt metric practices. That will lead to eventual adoption of metric by the general public.


RE: Please use ISO units
By KashGarinn on 3/20/2009 5:18:07 AM , Rating: 2
It wouldn't work.

The thing is, if you want to switch systems, you have to COMPLETELY STOP using the older one and start using the new one.

Canada did this, and it worked.

U.S. tried this a long time ago: http://en.wikipedia.org/wiki/Metrication_in_the_Un... - But they failed because they didn't realize that while you can convert from one to other, you won't ever completely go over to the new system, as you're always converting, and you'll never stop converting.

If U.S. would just stop completely using the old system, and start with the metric system, then you'd finally use it, but until that happens, you won't.

There are benefits to this in a global society that we speak a common language we all understand, within any metric.

If you disagree, then please reply with your argument in Icelandic, a language which is by far better than English.


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