CullmanTimes.com - Cullman, Alabama

Education

January 29, 2014

Water, condition for life on Mars, confirmed by second NASA rover

SAN FRANCISCO —  Samples from the rim of a 3.7 billion year old crater on Mars are the earliest evidence of water activity yet discovered, confirming previous findings that conditions existed on the now-rocky planet for life formation.

A group of rocks called the Matijevic formation suggested mild conditions on Mars billions of years ago, according to a finding from the National Aeronautics and Space Administration's Opportunity rover, which touched down on the planet in 2004. The discovery was published on line Thursday in the journal Science.

The finding adds to the more-recent Curiosity mission, which also found evidence of ancient habitability 3.5 billion years ago. While that doesn't mean life actually formed on Mars, it gives scientists more hope, said Raymond Arvidson, the study author and head of NASA's Planetary Data System Geosciences Node.

"The older you go in geologic time, the wetter it was on the surface, and the more evidence for flowing water and ground water, under conditions that are more earth-like," said Arvidson, who also is a professor at Washington University at St. Louis.

Later in Mars's history, the ground water was more acidic and salty, making it difficult for even the most extreme known bacteria to live, Arvidson said in a telephone interview.

The discovery was made on Endeavor, an ancient impact crater from the first period of geologic time, Arvidson said. It has since been heavily eroded by water. The rover found a clay mineral that forms in water under mildly acidic conditions. Though Endeavor is old, the Matijevic formation is even older, and is made of rocks that were sitting on Mars when the asteroid or comet that created the crater hit.

The researchers also found a kind of clay that commonly forms on earth when water flows through fractures in the rock. That suggests a lot of mild groundwater leeched material from the rocks, Arvidson said.

It isn't clear that the conditions were right to preserve any carbon, which can be a signature of life. If Curiosity, the rover that landed on Mars in 2012, were to drive to the Matijevic formation and sample it, that may aid in determining whether any carbon was there.

The younger rover is now headed toward Mt. Sharp, which is composed of about 5,000 meters (16,404 feet) of layered sedimentary rock, which Arvidson described as "a geological strip chart recorder" of Mars's history.

"This is way beyond saying we have water on Mars," he said. "This is trying to get to past chemical conditions of the water, and say something about habitability, and directing future missions to the juiciest havens."



 

1
Text Only
Education
  • WSCC patient care specialist BOOST program offers certification as Patient Care Specialist in one year

    Starting this fall, Wallace State Community College will offer a new health program aimed at helping individuals who are looking for entry into the medical field, or to change gears after spending time out of the workforce, whether from losing their jobs due to the economy, downsizing or other factors.

    July 21, 2014 1 Photo

  • WSCC HILL.jpg Hill hits the ground running at Wallace State

    Marcie Hill of Double Springs likes taking on new challenges. As an 18-year veteran of the education system, Hill has taught first grade, sixth grade and served as a reading coach to students and teachers in Kindergarten through sixth grade.

    July 16, 2014 1 Photo

  • Barnes enjoy Samford's governor's school.jpg Area residents enjoy Samford’s Alabama Governor’s School

    Students from two area high schools were chosen to attend Alabama Governor’s School at Samford University June 15-27. They were among 91 outstanding rising high school seniors from 24 counties who were selected for the two-week honors program.
     

    July 10, 2014 1 Photo

  • University of Memphis Reduces Tuition for Out-of-State Students

    The Tennessee Board of Regents has approved a proposal that will significantly reduce the amount of tuition that out-of-state students pay to attend the University of Memphis.


    Under the new 250-R program, full-time undergraduates who graduated from a high school within 250 miles of Memphis will now pay $12,456 a year, an almost $10,000 reduction from last year’s amount of $21,768.

    June 20, 2014

  • WSCC students SkillsUSA comp 1.jpg Four Wallace State students set to compete this month at the 50th annual SkillsUSA National Leadership and Skills Conference

    Wallace State’s Technical Division has made it an annual tradition to send multiple students to the SkillsUSA national competition. This year is no different.

    June 11, 2014 3 Photos

  • Dickerson chosen Boys State.jpg Dickerson chosen to attend Boys State

    Davis Dickerson, a student at Good Hope High School, son of Bruce and Jennifer Dickerson, received the American Legion Boys’ State award for 2014 from American Legion Post 4 Adjutant Don Reid.

    June 3, 2014 1 Photo

  • Southern Am. Legion Girls State.jpg Southern chosen for Girls State

    Miranda Southern, a student at Good Hope High School, daughter of Douglas Southern, received the American Legion Auxiliary 2014 Girls’ State award of $200 from American Legion Auxiliary Unit 4 Secretary-Treasurer Mary Reid.

    June 3, 2014 1 Photo

  • Cullman students earn Martin Methodist College honors

    Two residents of Cullman County received academic honors during the spring semester at Martin Methodist College in Pulaski, Tenn.
    Brandie Overton and Darcie Wilson, both of Cullman, were named to the Dean’s List with a semester grade point average of 3.5 to 3.9.

    May 30, 2014

  • Crisologo earns degree.jpg Crisologo earns D.P.M. degree from Des Moines University

    Des Moines University granted 539 degrees at its 2014 Commencement Ceremony, the 114th in the university's history, on Saturday, May 24, at 10 a.m. at Hy-Vee Hall in the Iowa Events Center in Des Moines. The dean from each of the three DMU colleges presented their classes and DMU President Angela L. Walker Franklin, Ph.D., conferred degrees.

    May 29, 2014 1 Photo

  • Moon graduates from Southeastern Bible College

    John Clint Moon of Empire was awarded an associate of arts degree in leadership ministries from Southeastern Bible College Friday, May 9, 2014.

    May 29, 2014