News From Terre Haute, Indiana

Community News Network

March 15, 2013

Mars was habitable, but no sign of inhabitants

By drilling into Mars for the first time and analyzing a martian rock in unprecedented detail, Curiosity team members have shown that eons ago, microorganisms could have lived on Mars. At a spot on the floor of Gale crater-the site the rover has been studying since landing on Mars last August -- there was mud long-wetted by benign waters, a ready supply of the essential elements of life as we know it, and energy enough to power life. The search for the remains of ancient life was not so lucky.

Curiosity found "all the things we were really hoping for in a habitable environment," said Michael Meyer, lead scientist for NASA's Mars Exploration Program at headquarters in Washington. Curiosity project scientist John Grotzinger of the California Institute of Technology in Pasadena made it a bit more personal: "We have found a habitable environment so benign that if you were on the planet when water was around, you would have been able to drink it."

The news of certain martian habitability came Tuesday at a Curiosity press conference at NASA headquarters. Orbiting spacecraft had imaged lots of places where early in Mars history there was plenty of water-river channels and crater lakes for sure, maybe even an ocean-and some of those once-watery locales even had signs of clay. Rock turns into clay only after long exposure to water of more or less neutral pH. In fact, the Opportunity rover is still roaming across a plain of once water-soaked rock. But it turned out to be rotted by highly acidic brine-not a nice place for life.

The sediment that formed the rock outcrop drilled by Curiosity proved to have been far more hospitable, Curiosity team members reported at the press conference. For starters, geologists say that it could have been mud on the floor of a lake nestled on the crater floor 3 billion years or more ago, about the time fossil life first appeared on Earth. Curiosity's Chemistry and Mineralogy x-ray instrument showed that the rock is 20% to 30% clay. And the Sample Analysis at Mars (SAM) instrument package detected no chemical signs of high acidity or brines. Concentrated brines can suck the water out of any microbes.

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Community News Network
  • To sleep well, you may need to adjust what you eat and when

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    April 16, 2014

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    April 16, 2014

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    April 16, 2014

  • Screen Shot 2014-04-16 at 12.51.22 PM.png VIDEO: Toddler climbs into vending machine

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    April 16, 2014 1 Photo

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  • Victimized by the 'marriage penalty'

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    April 15, 2014

  • Allergies are the real midlife crisis

    One of the biggest mysteries is why the disease comes and goes, and then comes and goes again. People tend to experience intense allergies between the ages of 5 and 16, then get a couple of decades off before the symptoms return in the 30s, only to diminish around retirement age.

    April 15, 2014

  • treadmill-very-fast.jpg Tax deduction for a gym membership?

    April marks another tax season when millions of Americans will deduct expenses related to home ownership, children and education from their annual tax bill. These deductions exist because of their perceived value to society; they encourage behaviors that keep the wheels of the economy turning. So why shouldn't the tax code be revised to reward preventive health?

    April 15, 2014 1 Photo

  • bomb1 VIDEO: A year after marathon bombing, Boston remains strong

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    April 15, 2014 1 Photo

  • Google acquires drone maker Titan Aerospace to spread Internet

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    April 14, 2014

  • E-Cigarettes target youth with festivals, lawmakers say

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    April 14, 2014

  • Search teams will send unmanned sub to look for missing Malaysian airliner

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    April 14, 2014

  • Why Facebook is getting into the banking game

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    April 14, 2014

  • Screen shot 2014-04-11 at 4.49.09 PM.png Train, entertain your pets with these 3 smartphone apps

    While they may not have thumbs to use the phone, pets can benefit from smartphone apps designed specifically for them.

    April 11, 2014 1 Photo

  • Stepping forward: The real Colbert

    Letterman changed the late-night TV game between his run on NBC's "Late Night" and starting the "Late Show" franchise in 1993. And while it's tough to replace a pop-culture icon, Colbert, in terms of pedigree and sense of humor, makes the most sense.

    April 11, 2014

  • Millions of Android phones, tablets vulnerable to Heartbleed bug

    Millions of smartphones and tablets running Google's Android operating system have the Heartbleed software bug, in a sign of how broadly the flaw extends beyond the Web and into consumer devices.

    April 11, 2014

  • 25801486.jpg VIDEO: Northern California bus crash kills 10

    At least nine people died in Northern California on Thursday night, in an accident involving a bus, a car and FedEx truck. The bus was filled with high school students from Southern California who were on their way to visit a college campus.

    April 11, 2014 1 Photo

  • Teens trading naked selfies for mugshots

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    April 10, 2014

  • Boston doctors can now prescribe you a bike

    The City of Boston this week is rolling out a new program that's whimsically known as "Prescribe-a-Bike." Part medicine, part welfare, the initiative allows doctors at Boston Medical Center to write "prescriptions" for low-income patients to get yearlong memberships to Hubway, the city's bike-share system, for only $5.

    April 10, 2014

  • DayCareCosts.jpg Day care's cost can exceed college tuition in some states

    Most parents will deal with an even larger kid-related expense long before college, and it's a cost that very few of them are as prepared for: day care.

    April 10, 2014 1 Photo

  • VIDEO: CBS taps Colbert as Letterman’s Late Show successor

    Bloomberg’s Jon Erlichman reports that CBS has announced Stephen Colbert as its choice to replace the retiring David Letterman as host of “The Late Show” on Bloomberg Television’s “Lunch Money.”

     

    April 10, 2014

  • Screen Shot 2014-04-10 at 10.25.07 AM.png VIDEO: Cement truck crashes into minivan

    A professor at Texas A&M University was fortunate to escape serious injury recently when a cement truck ran a red light at a College Station intersection and crashed head-on into his minivan. A dash camera that Dr. Guan Zhu had installed about a year ago captured the entire incident.

    April 10, 2014 1 Photo

  • 2012_Mazda6_--_NHTSA.jpg Brakes, steering and...spiders? What's behind the latest auto recalls

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    Check out the full list of 2014 recalls.

    April 9, 2014 1 Photo

  • Screen Shot 2014-04-09 at 5.06.43 PM.png Spartans mourn passing of 'Princess Lacey'

    Lacey Holsworth, the 8-year-old cancer patient from Michigan who befriended Michigan State forward Adreian Payne and established a bond with his teammates before and during the Spartans’ run to the Elite Eight, died at her home late Tuesday night, her family said.

    April 9, 2014 1 Photo

  • Screen Shot 2014-04-09 at 4.02.29 PM.png VIDEO: Nebraska prom mishap goes viral

    A group of 22 high school students from Pierce, Neb., all decked out in prom finery, took an unplanned dip in a four-foot-deep pond when the bridge they were posing on for pictures gave way. Photos from the incident have gone viral on social media.

    April 9, 2014 1 Photo

  • Is a paleo vegetarian diet possible?

    Research shows most people can follow a regimented eating plan for a short time. That's not the challenge. The challenge is finding a healthful eating plan you can follow day after day and achieve your long-term health goals. At this point, it doesn't appear that the paleo eating plan meets these objectives for most people.

    April 9, 2014

  • 10 tips for surviving a severe allergy season

    My colleague Brady Dennis reported recently that the arrival of warmer weather will soon unleash a pollen tsunami in parts of the country where the winter has been especially long and cold. Here are some survival tips from Clifford W. Bassett, an allergy specialist and assistant clinical professor of medicine at the New York University School of Medicine.

    April 9, 2014

  • 140407_GT_OUT_Forster_1.jpg Revolutionary War flag could fetch millions at auction

    An iconic piece of history from the Revolutionary War is up for auction through Doyle New York, an auction and appraising company in New York City.

    April 9, 2014 1 Photo

  • pix_internet_security_01.jpg 'Heartbleed' flaw leads security experts to urge password changes

    Security experts are urging consumers to change their Web passwords after the recent disclosure of a vulnerability touching wide swaths of the Internet, even as Google, Facebook and large banks said they weren't affected.

    April 9, 2014 1 Photo

  • hank_aaron_display_image.jpg VIDEO: Aaron's historic homer

    On the 40th anniversary of Hank Aaron's record-breaking 715th career home run, take a look at the historic moment as it happened.

    April 8, 2014 1 Photo

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