Water flowed 'recently' on Mars - GoFuckYourself.com

uno · 12-06-2006, 12:18 PM

http://news.bbc.co.uk/1/hi/sci/tech/6214834.stm

Nasa says it has found "compelling" evidence that liquid water flowed recently on the surface of Mars.
The finding adds further weight to the idea that Mars might harbour the right conditions for life.

The appearance of gullies, revealed in orbital images from a Nasa probe, suggests that water could have flowed on the surface in the last few years.

But some scientists think these fresh gullies could also have been cut by liquid carbon dioxide (CO2).

The latest research emerged when Nasa's Mars Global Surveyor (MGS) spacecraft spotted gullies and trenches that scientists believed were geologically young and carved by fast-moving water coursing down cliffs and steep crater walls.

Scientists at the San Diego-based Malin Space Science Systems, who operate a camera aboard MGS decided to retake photos of thousands of gullies in search of evidence for recent water activity.

Two gullies that were originally photographed in 1999 and 2001, and imaged again in 2004 and 2005, showed changes consistent with water flowing down the crater walls, according to the study.

In both cases, scientists found bright, light-coloured deposits in the gullies that were not present in the original photos. They concluded that the deposits - possibly mud, salt or frost - were left there when water recently cascaded through the channels.

Other scientists think it possible that gullies like this were caused not by water but by liquid carbon dioxide.

One of the reasons for favouring CO2 was that computer models of the Martian crust indicated water could exist only at depths of several kilometres. Liquid carbon dioxide, on the other hand, could persist much nearer the surface where temperatures can drop as low as -107C.

Prospects for life

Oded Aharonson, an assistant professor of planetary science at the California Institute of Technology (Caltech) said that while the interpretation of recent water activity on Mars was "compelling," it was just one possible explanation.

Aharonson said further study was needed to determine whether the deposits could have been left there by the flow of dust rather than water.

Deciding what was responsible for the features is a pressing question that has important consequences for the likelihood of life on Mars. Scientists have proposed that reservoirs of liquid water could exist beneath the Martian surface, providing a habitat for microbial life.

"This underscores the importance of searching for life on Mars, either present or past," said Bruce Jakosky, an astrobiologist at the University of Colorado at Boulder, who had no role in the study. "It's one more reason to think that life could be there."

Mars Global Surveyor abruptly lost radio contact with Earth last month. Attempts to locate the spacecraft, which has mapped the Red Planet since 1996, have failed, and scientists fear it is lost.

Nasa's Mars rovers, which landed in 2004, have sent scientists back equally strong evidence that liquid water flowed on the surface in ancient times, based on observations of alterations in ancient rocks.

"We're now realising Mars is more active than we previously thought, and that the mid-latitude section seems to be where all the action is," said Arizona State University scientist Phil Christensen, who was not part of the current research.

Details of the work appear in the journal Science.

XAKEP · 12-06-2006, 12:20 PM

It is interesting!!! About this what you think!!!

germ · 12-06-2006, 12:51 PM

interesting read.

pimplink · 12-06-2006, 12:59 PM

What's next? We all move to Mars?

directfiesta · 12-06-2006, 01:08 PM

As long as OIL doesn't flow, Mars is SAFE !

BoyAlley · 12-06-2006, 01:12 PM

Quote:

Originally Posted by directfiesta

As long as OIL doesn't flow, Mars is SAFE !

Dagwolf · 12-06-2006, 01:16 PM

I wasn't aware that CO2 could exist in liquid form; I thought it went straight from solid (dry ice) to gas.

BigCashCrew · 12-06-2006, 01:16 PM

I read that Saturn has a few moons that supply enough oil for the entire world to never run out.

ADL Colin · 12-06-2006, 01:18 PM

Quote:

Originally Posted by BigCashCrew

I read that Saturn has a few moons that supply enough oil for the entire world to never run out.

Only cost ya about $100,000/gallon!

tytyguy · 12-06-2006, 01:27 PM

ill be the first to move there.

SCORE Ralph · 12-06-2006, 01:28 PM

Quote:

Originally Posted by directfiesta

As long as OIL doesn't flow, Mars is SAFE !

If its not oil it will be something else

XAKEP · 12-06-2006, 01:29 PM

Do you think Mars was how Earth now is? Some billion of years prior? I believe so.

reynold · 12-07-2006, 09:05 AM

Quote:

Originally Posted by XAKEP

Do you think Mars was how Earth now is? Some billion of years prior? I believe so.

Nope. The fact that earth and Mars are in two different orbits, it's hard to believe that these two planets uare undergoing the same geophysical processes.

uno · 12-07-2006, 09:33 AM

It's possible that it was once primitive-earth-like, but I can't imagine if there ever was life that it got beyond single celled organisms.

martinsc · 12-07-2006, 09:34 AM

cool1 · 12-07-2006, 09:38 AM

Quote:

Originally Posted by directfiesta

As long as OIL doesn't flow, Mars is SAFE !

damn excellent one

needlive · 12-07-2006, 09:52 AM

I think "they" can hide anything they want to...or have I just watched X-Files too much?

marumari · 12-07-2006, 02:11 PM

no your right. "they" hide all the good stuff... x-files or not.
and by "they" are you talking about the aliens, or the government, or both?

CaptainHowdy · 12-07-2006, 02:12 PM

It's a conspiracy!

uno · 12-07-2006, 02:14 PM

Quote:

Originally Posted by marumari

no your right. "they" hide all the good stuff... x-files or not.
and by "they" are you talking about the aliens, or the government, or both?

You know... "Them".

Lane · 12-07-2006, 02:21 PM

Quote:

Originally Posted by Dagwolf

I wasn't aware that CO2 could exist in liquid form; I thought it went straight from solid (dry ice) to gas.

liquid CO2 can exist at high pressures (5-6 times the air pressure on earth)

but not sure how it can happen on mars. the air pressure is very low there. maybe it forms underground with pressure and comes out as a boiling liquid to the surface.

marumari · 12-07-2006, 02:58 PM

"They" Live! www.stopabductions.com LOL

Viper2K1 · 12-07-2006, 03:03 PM

they're mainly securing their own over-paid jobs ...

NinjaSteve · 12-07-2006, 03:23 PM

You can move there now! Proof that you can live there. Alright, high five!

4Man · 12-07-2006, 04:42 PM

That is cool.We are going to MArs?

madawgz · 12-07-2006, 04:54 PM

well thats good, hopefully we will move there someday

nikki99 · 12-07-2006, 04:58 PM

Quote:

Originally Posted by martinsc

I can bet this is the first time this icon is used

Ohface · 12-07-2006, 05:55 PM

Quote:

Originally Posted by nikki99

I can bet this is the first time this icon is used

Very probably!

12-06-2006, 12:18 PM	#1
uno RIP Dodger. BEST.CAT.EVER Industry Role: Join Date: Dec 2002 Location: NYC Area Posts: 18,450	Water flowed 'recently' on Mars http://news.bbc.co.uk/1/hi/sci/tech/6214834.stm Nasa says it has found "compelling" evidence that liquid water flowed recently on the surface of Mars. The finding adds further weight to the idea that Mars might harbour the right conditions for life. The appearance of gullies, revealed in orbital images from a Nasa probe, suggests that water could have flowed on the surface in the last few years. But some scientists think these fresh gullies could also have been cut by liquid carbon dioxide (CO2). The latest research emerged when Nasa's Mars Global Surveyor (MGS) spacecraft spotted gullies and trenches that scientists believed were geologically young and carved by fast-moving water coursing down cliffs and steep crater walls. Scientists at the San Diego-based Malin Space Science Systems, who operate a camera aboard MGS decided to retake photos of thousands of gullies in search of evidence for recent water activity. Two gullies that were originally photographed in 1999 and 2001, and imaged again in 2004 and 2005, showed changes consistent with water flowing down the crater walls, according to the study. In both cases, scientists found bright, light-coloured deposits in the gullies that were not present in the original photos. They concluded that the deposits - possibly mud, salt or frost - were left there when water recently cascaded through the channels. Other scientists think it possible that gullies like this were caused not by water but by liquid carbon dioxide. One of the reasons for favouring CO2 was that computer models of the Martian crust indicated water could exist only at depths of several kilometres. Liquid carbon dioxide, on the other hand, could persist much nearer the surface where temperatures can drop as low as -107C. Prospects for life Oded Aharonson, an assistant professor of planetary science at the California Institute of Technology (Caltech) said that while the interpretation of recent water activity on Mars was "compelling," it was just one possible explanation. Aharonson said further study was needed to determine whether the deposits could have been left there by the flow of dust rather than water. Deciding what was responsible for the features is a pressing question that has important consequences for the likelihood of life on Mars. Scientists have proposed that reservoirs of liquid water could exist beneath the Martian surface, providing a habitat for microbial life. "This underscores the importance of searching for life on Mars, either present or past," said Bruce Jakosky, an astrobiologist at the University of Colorado at Boulder, who had no role in the study. "It's one more reason to think that life could be there." Mars Global Surveyor abruptly lost radio contact with Earth last month. Attempts to locate the spacecraft, which has mapped the Red Planet since 1996, have failed, and scientists fear it is lost. Nasa's Mars rovers, which landed in 2004, have sent scientists back equally strong evidence that liquid water flowed on the surface in ancient times, based on observations of alterations in ancient rocks. "We're now realising Mars is more active than we previously thought, and that the mid-latitude section seems to be where all the action is," said Arizona State University scientist Phil Christensen, who was not part of the current research. Details of the work appear in the journal Science. __________________ -uno icq: 111-914 CrazyBabe.com - porn art MojoHost - For all your hosting needs, present and future. Tell them I sent ya!

12-06-2006, 12:59 PM	#4
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12-06-2006, 01:08 PM	#5
directfiesta Too lazy to set a custom title Industry Role: Join Date: Oct 2002 Location: Montreal, Quebec Posts: 29,751	As long as OIL doesn't flow, Mars is SAFE ! __________________ I know that Asspimple is stoopid ... As he says, it is a FACT ! But I can't figure out how he can breathe or type , at the same time ....

12-06-2006, 01:16 PM	#7
Dagwolf President of Canada Join Date: Sep 2003 Location: Leaving Hell, Entering Limbo Posts: 23,141	I wasn't aware that CO2 could exist in liquid form; I thought it went straight from solid (dry ice) to gas. __________________ Sleep well, and dream of large women.

12-07-2006, 09:33 AM	#14
uno RIP Dodger. BEST.CAT.EVER Industry Role: Join Date: Dec 2002 Location: NYC Area Posts: 18,450	It's possible that it was once primitive-earth-like, but I can't imagine if there ever was life that it got beyond single celled organisms. __________________ -uno icq: 111-914 CrazyBabe.com - porn art MojoHost - For all your hosting needs, present and future. Tell them I sent ya!

12-06-2006, 12:20 PM	#2
XAKEP Ask me about negative cash flow Join Date: Aug 2003 Posts: 518	It is interesting!!! About this what you think!!!

12-06-2006, 12:51 PM	#3
germ ( o Y o ) Industry Role: Join Date: Oct 2002 Posts: 3,108	interesting read.

12-06-2006, 01:16 PM	#8
BigCashCrew Registered User Join Date: Aug 2005 Posts: 3,570	I read that Saturn has a few moons that supply enough oil for the entire world to never run out.

12-06-2006, 01:27 PM	#10
tytyguy So Fucking Banned Join Date: Jan 2006 Location: Anywhere u want Posts: 983	ill be the first to move there.

12-06-2006, 01:29 PM	#12
XAKEP Ask me about negative cash flow Join Date: Aug 2003 Posts: 518	Do you think Mars was how Earth now is? Some billion of years prior? I believe so.

12-07-2006, 09:34 AM	#15
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12-07-2006, 09:52 AM	#17
needlive Confirmed User Industry Role: Join Date: Nov 2006 Posts: 2,191	I think "they" can hide anything they want to...or have I just watched X-Files too much? __________________ http://www.needlive.com Adult XXX Cams

12-07-2006, 02:11 PM	#18
marumari Confirmed User Join Date: Dec 2004 Location: underground dwelling Posts: 755	no your right. "they" hide all the good stuff... x-files or not. and by "they" are you talking about the aliens, or the government, or both? __________________ http://www.virtualhottiecash.com icq 456382288

12-07-2006, 02:12 PM	#19
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12-07-2006, 02:58 PM	#22
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12-07-2006, 03:03 PM	#23
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12-07-2006, 03:23 PM	#24
NinjaSteve Too lazy to set a custom title Industry Role: Join Date: Dec 2003 Posts: 11,089	You can move there now! Proof that you can live there. Alright, high five! __________________ ...

12-07-2006, 04:42 PM	#25
4Man Confirmed User Join Date: Nov 2006 Posts: 3,830	That is cool.We are going to MArs?

12-07-2006, 04:54 PM	#26
madawgz 8.8.8.8 Industry Role: Join Date: Mar 2006 Location: Noordermarkt Posts: 30,509	well thats good, hopefully we will move there someday __________________ TAEMDLRMSKRJIXMRLSMRJ.