Mars had all ingredients of life: NASA
By Naomi Seck, AFPWASHINGTON--Analysis of Mars rocks by the Curiosity rover uncovered the building blocks of life — hydrogen, carbon and oxygen — and evidence the planet could once have supported organisms, NASA said Tuesday.
March 14, 2013, 12:00 am TWN
“A fundamental question for this mission is whether Mars could have supported a habitable environment,” Michael Meyer, lead scientist for NASA's Mars Exploration Program said. “From what we know now, the answer is yes.”
At a televised press conference, the NASA team said this is the first definitive proof a life-supporting environment had existed beyond Earth.
“There are places we've suggested could be habitable, but we haven't measured there,” said Dave Blake, principal investigator for Curiosity's Chemistry and Mineralogy investigation.
Curiosity, a six-wheeled robot with 10 scientific instruments on board, is the most sophisticated vehicle ever sent to another planet.
The sample was drilled from sedimentary bedrock in an area which previous research had shown to be an ancient river system or lake bed.
It was found to contain clay minerals, sulfate minerals and other chemicals.
Based on the analysis of those chemicals, researchers were able to determine that the water in which the rocks were formed was of a relatively neutral pH — not overly salty, acidic, or oxidizing.
“We have found a habitable environment that is so benign and supportive of life, that probably if this water was around and you had been there, you would have been able to drink it,” said John Grotzinger, a Curiosity project scientist from the California Institute of Technology.
Speaking at the same press conference, one of NASA's top officials John Grunsfeld said the discovery makes him “feel giddy.”
He said the new data helps add to the picture of what the red planet may have looked in a previous era, with a possible freshwater lake and a snow-capped Mount Sharp.
But it wouldn't have looked like that any time recently, the researchers cautioned.
Although it is hard to confirm an exact date, it was probably at least three billion years ago, said Grotzinger.
Researchers also noted that future rock samples will be needed to confirm these results, because it is possible that residual carbon on the drill affected the analysis.