News / Science & Technology

    Next Mars Rover Could Look for Signs of Past Life

    Artist's Concept of Mars 2020 Rover (NASA/JPL-Caltech )
    Artist's Concept of Mars 2020 Rover (NASA/JPL-Caltech )
    Suzanne Presto
    The U.S. space agency, NASA, is planning to send another rover to Mars in 2020.  
    A NASA-appointed team of 19 scientists and engineers says the next Mars rover should seek out signs of past life on the Red Planet and collect samples for possible future return to Earth.

    One member of the Mars 2020 Science Definition Team, Lindy Elkins-Tanton of the Carnegie Institution in Washington, studies the evolution of planets.  She told reporters during a NASA teleconference that questions are what drive scientific discoveries.   

    "And one of the very biggest questions for all of humankind is, 'are we alone?' and that is the question we're hoping to make really big advances with with this Mars 2020 mission," she said.

    Scientists already scored a major victory when NASA's Curiosity rover, which landed on the Red Planet last August, provided evidence that ancient Mars had an environment that could have supported living microbes.  

    The team says the next step is to actually seek out biosignatures, preserved features in ancient rocks and soil that could have formed biologically.         

    Jack Mustard is the chair of the Science Definition Team and a professor of geological sciences at Brown University in Rhode Island.  He says team members did discuss whether to look for existing life on Mars.

    "But the feeling was, on the basis of the scientific evidence we have today, that the most logical steps forward were to look for the ancient signs of life that would be preserved within the rock record," he explained, adding that evidence suggests that habitable environments on Mars were common in the ancient past.

    The next rover will look similar to the car-sized, six-wheeled Curiosity rover, in part because using an existing design will reduce costs.  The 2020 rover would be able to drill into and sample Martian rock, just as Curiosity does now.  But the team says a major objective for the next rover is to package as many as 31 samples that could be returned to Earth during a later mission.

    John Grunsfeld, a former astronaut and NASA's associate administrator for science in Washington, noted that while the 2020 rover mission concept allows for the selection, gathering and caching of samples, it does not include their eventual return.

    "I wouldn't rule out that perhaps human explorers will go and retrieve the cache, you know, in 20-plus years from now, as explorers set foot on Mars," he said.  "That's an eventual goal: to put astrobiologists and planetary scientists on the surface of Mars."

    The team also says the 2020 rover should help advance NASA's plans for human exploration of the Red Planet in the 2030s.  The 2020 mission could help scientists understand any hazards posed by Martian dust or demonstrate ways to collect carbon dioxide that could be used as a resource for making oxygen or rocket fuel.

    The Mars 2020 Science Definition Team is made up of experts from universities, research institutions and NASA.  They spent much of 2013 preparing guidelines for the Mars 2020 mission and released a 154-page report on Tuesday.

    You May Like

    US-Russia Tensions Complicate Syria War

    With a shared enemy and opposing allies, Russia and the US are working to avoid confrontation

    Video Re-opening Old Wounds in Beirut's Bullet-riddled Yellow House

    Built in neo-Ottoman style in 1920s, it is set to be re-opened in Sept. as ‘memory museum’ - bullet-riddled walls and bunkered positions overlooking city’s notorious ‘Green Line’ maintained for posterity

    Cambodian-Americans Lobby for Human Rights Resolution

    Resolution condemns all forms of political violence in Cambodia, urges Cambodian government to end human rights violations, calls for respect of press freedom

    Featured Videos

    Your JavaScript is turned off or you have an old version of Adobe's Flash Player. Get the latest Flash player.
    Brexit Vote Plunges Global Markets Into Uncharted Territoryi
    X
    June 24, 2016 9:38 PM
    British voters plunged global markets into unknown territory after they voted Thursday to leave the European Union. The results of the Brexit vote, the term coined to describe the referendum, caught many off guard. Analysts say the resulting volatility could last for weeks, perhaps longer. Mil Arcega reports.
    Video

    Video Brexit Vote Plunges Global Markets Into Uncharted Territory

    British voters plunged global markets into unknown territory after they voted Thursday to leave the European Union. The results of the Brexit vote, the term coined to describe the referendum, caught many off guard. Analysts say the resulting volatility could last for weeks, perhaps longer. Mil Arcega reports.
    Video

    Video Orlando Shooting Changes Debate on Gun Control

    It’s been nearly two weeks since the largest mass shooting ever in the United States. Despite public calls for tighter gun control laws, Congress is at an impasse. Democratic lawmakers resorted to a 1960s civil rights tactic to portray their frustration. VOA’s Carolyn Presutti explains how the Orlando, Florida shooting is changing the debate.
    Video

    Video Tunisian Fishing Town Searches for Jobs, Local Development Solutions

    As the European Union tries to come to grips with its migrant crisis, some newcomers are leaving voluntarily. But those returning to their home countries face an uncertain future.  Five years after Tunisia's revolution, the tiny North African country is struggling with unrest, soaring unemployment and plummeting growth. From the southern Tunisian fishing town of Zarzis, Lisa Bryant takes a look for VOA at a search for local solutions.
    Video

    Video 'American Troops' in Russia Despite Tensions

    Historic battle re-enactment is a niche hobby with a fair number of adherents in Russia where past military victories are played-up by the Kremlin as a show of national strength. But, one group of World War II re-enactors in Moscow has the rare distinction of choosing to play western ally troops. VOA's Daniel Schearf explains.
    Video

    Video Experts: Very Few Killed in US Gun Violence Are Victims of Mass Shootings

    The deadly shooting at a Florida nightclub has reignited the debate in the U.S. over gun control. Although Congress doesn't provide government health agencies funds to study gun violence, public health experts say private research has helped them learn some things about the issue. VOA's Carol Pearson reports.
    Video

    Video Trump Unleashes Broadside Against Clinton to Try to Ease GOP Doubts

    Recent public opinion polls show Republican Donald Trump slipping behind Democrat Hillary Clinton in the presidential election matchup for November. Trump trails her both in fundraising and campaign organization, but he's intensifying his attacks on the former secretary of state. VOA National Correspondent Jim Malone reports.
    Video

    Video Muslim American Mayor Calls for Tolerance

    Syrian-born Mohamed Khairullah describes himself as "an American mayor who happens to be Muslim." As the three-term mayor of Prospect Park, New Jersey, he believes his town of 6,000 is an example of how ethnicity and religious beliefs should not determine a community's leadership. Ramon Taylor has this report from Prospect Park.
    Video

    Video Internal Rifts Over Syria Policy Could Be Headache for Next US President

    With the Obama administration showing little outward enthusiasm for adopting a more robust Syria policy, there is a strong likelihood that the internal discontent expressed by State Department employees will roll over to the next administration. VOA State Department correspondent Pam Dockins reports.
    Video

    Video Senegal to Park Colorful ‘Cars Rapide’ Permanently

    Brightly painted cars rapide are a hallmark of Dakar, offering residents a cheap way to get around the capital city since 1976. But the privately owned minibuses are scheduled to be parked for good in late 2018, as Ricci Shryock reports for VOA.
    Video

    Video Florida Gets $1 Million in Emergency Government Funding for Orlando

    The U.S. government has granted $1 million in emergency funding to the state of Florida to cover the costs linked to the June 12 massacre in Orlando. U.S. Attorney General Loretta Lynch announced the grant Tuesday in Orlando, where she met with survivors of the shooting attack that killed 49 people. Zlatica Hoke reports.
    Video

    Video How to Print Impossible Shapes with Metal

    3-D printing with metals is rapidly becoming more advanced. As printers become more affordable, the industry is partnering with universities to refine processes for manufacturing previously impossible things. A new 3-D printing lab aims to bring the new technology closer to everyday use. VOA's George Putic reports.
    Video

    Video Big Somali Community in Minnesota Observes Muslim Religious Feast

    Ramadan is widely observed in the north central US state of Minnesota, which a large Muslim community calls home. VOA Somali service reporter Mohmud Masadde files this report from Minneapolis, the state's biggest city.

    Special Report

    Adrift The Invisible African Diaspora