Stillwater News Press

Our World

September 4, 2013

Are we Martians after all?

If you looked in a mirror this morning, you may have seen a descendant of creatures from Mars. That is, if biochemist Steven Benner of the Westheimer Institute of Science and Technology in Gainesville, Fla. is right. "Life started on Mars and came to Earth on a rock," Benner declares. Today, at the European Association of Geochemistry's Goldschmidt Conference in Florence, Italy, Benner made what many in the origin-of-life debate call an interesting, but not convincing, new case for our martian heritage.

However and wherever life began, one thing is sure: Its first organic building blocks, called hydrocarbons, had a number of hurdles to clear before evolving into living cells. Fed with heat or light and left to themselves, hydrocarbons tend to turn into useless tarlike substances. And even when complex molecules like RNA (most biologists' best guess for the first genetic molecule) arise, water quickly breaks them down again.

Benner argues that those chemical hurdles would have been lower on early Mars than on young Earth. To begin with, early Earth was probably a water world, completely covered by oceans, but water covered only parts of Mars's surface. Moreover, he notes, rocks on Mars had a stronger oxidizing effect than rocks on Earth, so oxygen-bearing molecules would have formed more easily there. "This is established by observations today on both planets, as well as by models for how planets form," he says.

As a result, molybdates-molecules that contain molybdenum and oxygen-could have existed on Mars, but probably not on Earth. Like oxidized boron (which occurs in dry regions and would also have been rare on a water-covered early Earth), molybdates tend to prevent organic materials from turning into tar. Benner says laboratory experiments show that molybdates can convert certain organic molecules into ribose-an important component of DNA. "This is a fact," he says.

Text Only | Photo Reprints
Our World
  • To sleep well, you may need to adjust what you eat and when

    Sleep.  Oh, to sleep.  A good night's sleep is often a struggle for more than half of American adults.  And for occasional insomnia, there are good reasons to avoid using medications, whether over-the-counter or prescription.

    April 17, 2014

  • Doctors to rate cost effectiveness of expensive cancer drugs

    The world's largest organization of cancer doctors plans to rate the cost effectiveness of expensive oncology drugs, and will urge physicians to use the ratings to discuss the costs with their patients.

    April 17, 2014

  • Why Facebook is getting into the banking game

    Who would want to use Facebook as a bank? That's the question that immediately arises from news that the social network intends to get into the electronic money business.

    April 16, 2014

  • Victimized by the 'marriage penalty'

    In a few short months, I'll pass the milestone that every little girl dreams of: the day she swears - before family and God, in sickness and in health, all in the name of love - that she's willing to pay a much higher tax rate.

    April 16, 2014

  • portraitoflotte.jpg VIDEO: From infant to teen in four minutes

    Dutch filmmaker Frans Hofmeester’s time lapse video of his daughter, Lotte — created by filming her every week from her birth until she turned 14 — has become a viral sensation.

    April 16, 2014 1 Photo

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

    The City of Boston came together Tuesday to honor those who were injured and lost their lives at the Boston Marathon on the one-year anniversary of the bombing. While the day was sure to be emotional, those affected by last year's race are showing they won't let the tragedy keep them down.

    April 15, 2014 1 Photo

  • Teens trading naked selfies for mugshots

    Will teenagers ever learn? You think yours will. Maybe so. But it's likely that was also the hope of the parents of children who were so shamed by nude photos of themselves that went south - how else can they go - that they killed themselves.

    April 12, 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 12, 2014

  • 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 11, 2014

  • Granddaughter_BH.jpg Duke’s granddaughter visits Enid

    Actor John Wayne left a legacy his granddaughter, Anita Swift, works along with other family members to preserve.

    April 11, 2014 1 Photo

Must Read
Buy & Share Photos
NewsPress e-Edition
NewsPress Specials
AP Video
Raw: More Than 100,000 Gather for Easter Sunday Raw: Greeks Celebrate Easter With "Rocket War" Police Question Captain, Crew on Ferry Disaster Raw: Orthodox Christians Observe Easter Rite Ceremony Marks 19th Anniversary of OKC Bombing Raw: Four French Journalists Freed From Syria Raw: Massive 7.2 Earthquake Rocks Mexico Captain of Sunken SKorean Ferry Arrested Raw: Fire Destroys 3 N.J. Beachfront Homes Raw: Pope Presides Over Good Friday Mass Raw: Space X Launches to Space Station Superheroes Descend on Capitol Mall Man Charged in Kansas City Highway Shootings Obama Awards Navy Football Trophy Anti-semitic Leaflets Posted in Eastern Ukraine Raw: Magnitude-7.2 Earthquake Shakes Mexico City Ceremony at MIT Remembers One of Boston's Finest Raw: Students Hurt in Colo. School Bus Crash Deadly Avalanche Sweeps Slopes of Mount Everest
Stocks
NDN Video
Jabari Parker's Top 5 Plays From Duke Career Kourtney Kardashian Is a Bikini Babe More Manpower Than Ever Expected At 4/20 Rally Debunk'd: Miley Cyrus AIDS, Cheeseburgers Cause Cancer, Military Warning Bill Previewing the NBA playoffs Raw: Orthodox Christians Observe Easter Rite My name is Cocaine Raw: Space X Launches to Space Station Lohan Gets Candid About Her Sex List The 2014 New York Auto Show Meet Johnny Manziel's New Girlfriend Chelsea Clinton Announces Pregnancy Funny: Celebrating Easter with Martha Stewart and Friends Man Accuses 'X-Men' Director Bryan Singer of Sexually Abusing Him As a Teenager Man hit with $525 federal fine after he doesn't pay for soda refill Lea Michele & Naya Rivera Feuding? Jabari Parker declares for the NBA draft Singing Nun Belts Out Cyndi Lauper New West, Texas Explosion Video Swim Daily, Throwback Thursday