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

Photogallery Americans Celebrate Thanksgiving With Feasts, Festivities

Holiday traditions include turkey dinners, 'turkey trots,' American-style football and New York parade with giant balloons More

Video For Obama, Ferguson Violence is a Personal Issue

With two years left in term, analysts say, president has less to lose by taking conversation on race further More

Video Italian Espresso Expands Into Space

When Italian astronaut Samantha Cristoforetti headed for the ISS, her countrymen worried how she would survive six months drinking only instant coffee More

Featured Videos

Your JavaScript is turned off or you have an old version of Adobe's Flash Player. Get the latest Flash player.
South Africa Sees Male Circumcision as Way to Reduce HIV Infectionsi
X
November 28, 2014 3:31 PM
South Africa remains plagued by AIDS despite massive government and NGO efforts on prevention and life-sustaining Anti-Retro-Viral programs. But the country has opened up another front to reduce new HIV infections: promoting circumcision. Emilie Iob reports for VOA News from a pioneering circumcision center in Orange Farm, Johannesburg.
Video

Video South Africa Sees Male Circumcision as Way to Reduce HIV Infections

South Africa remains plagued by AIDS despite massive government and NGO efforts on prevention and life-sustaining Anti-Retro-Viral programs. But the country has opened up another front to reduce new HIV infections: promoting circumcision. Emilie Iob reports for VOA News from a pioneering circumcision center in Orange Farm, Johannesburg.
Video

Video To Make A Living, Nairobi Street Vendors Face Legal Hurdles, Physical Violence

The Nairobi City Council has been accused of brutality in dealing with hawkers in the Central Business District - in order to stop them from illegally selling their wares on the streets. Lenny Ruvaga has more for VOA News from the Kenyan capital.
Video

Video For Obama, Ferguson Violence is a Personal Issue

Throughout the crisis in Ferguson, Missouri, President Barack Obama has urged calm, restraint and respect for the rule of law. But the events in Ferguson have prompted him to call — more openly than he has before — for profound changes to end the racism and distrust that he believes still exists between whites and blacks in the United States. VOA White House correspondent Luis Ramirez reports.
Video

Video Online Magazine Gets Kids Discussing Big Questions

Teen culture in America is often criticized for being superficial. But an online magazine has been encouraging some teenagers to explore deeper issues, and rewarding their efforts. VOA religion reporter Jerome Socolovsky went to this year’s Kidspirit awards ceremony in New York.
Video

Video US Community Kicks Off Thanksgiving With Parade

Thursday is Thanksgiving in the United States, a holiday whose roots go back to the country's earliest days as a British colony. One way Americans celebrate the occasion is with parades. Anush Avetisyan takes us to one such event on the day before Thanksgiving near Washington, where a community's diversity is on display. Joy Wagner narrates
Video

Video Aung San Suu Kyi: Myanmar Opposition to Keep Pushing for Constitutional Change

Myanmar opposition leader Aung San Suu Kyi says she and her supporters will continue pushing to amend a constitutional clause that bars her from running for president next year. VOA's Than Lwin Htun reports from the capital Naypyitaw in this report narrated by Colin Lovett.
Video

Video Mali Attempts to Shut Down Ebola Transmission Chain

Senegal and Nigeria were able to stop small Ebola outbreaks by closely monitoring those who had contact with the sick person and quickly isolating anyone with symptoms. Mali is now scrambling to do the same. VOA’s Anne Look reports from Mali on what the country is doing to shut down the chain of transmission.
Video

Video Ukraine Marks Anniversary of Deadly 1930s Famine

During a commemoration for millions who died of starvation in Ukraine in the early 1930s, President Petro Poroshenko lashed out at Soviet-era totalitarianism for causing the deaths and accused today’s Russian-backed rebels in the east of using similar tactics. VOA’s Daniel Shearf reports from Kyiv.
Video

Video Hong Kong Protests at a Crossroads

New public opinion polls in Hong Kong indicate declining support for pro-democracy demonstrations after weeks of street protests. VOA’s Bill Ide in Guangzhou and Pros Laput in Hong Kong spoke with protesters and observers about whether demonstrators have been too aggressive in pushing for change.
Video

Video US Immigration Relief Imminent for Mixed-Status Families

Tens of thousands of undocumented immigrants in the Washington, D.C., area may benefit from a controversial presidential order announced this week. It's not a path to citizenship, as some activists hoped. But it will allow more immigrants who arrived as children or who have citizen children, to avoid deportation and work legally. VOA's Victoria Macchi talks with one young man who benefited from an earlier presidential order, and whose parents may now benefit after years of living in fear.
Video

Video New Skateboard Defies Gravity

A futuristic dream only a couple of decades ago, the hoverboard – a skateboard that floats above the ground - has finally been made possible. While still not ready for mass production, it promises to become a cool mode of transport... at least over some surfaces. VOA’s George Putic reports.
Video

Video Falling Gas Prices Impact US Oil Extraction

With the price of oil now less than $80 a barrel, motorists throughout the United States are benefiting from gas prices below $3 a gallon. But as VOA’s Kane Farabaugh reports, the decreasing price of petroleum has a downside for the hydraulic fracturing industry in the United States.

All About America

AppleAndroid