Navigation Links
UCLA scientists strengthen case for life more than 3.8 billion years ago

ith UCLA's high-resolution ion microprobe--an instrument that enables scientists to learn the exact composition of samples. The microprobe shoots a beam of ions, or charged atoms, at a sample, releasing from the sample its own ions, which are then analyzed in a mass spectrometer. Scientists can aim the beam of ions at specific microscopic areas of a sample and analyze them.

While critics noted there are ways to make light carbon in the absence of life, Harrison considers those possibilities to be "extremely unlikely," especially in light of another discovery of rocks in Western Greenland, not far away, of the same age, and a similar ratio of 12C to 13C.

The scientists see light carbon inclusions in a phosphate mineral called apatite, which is also the material of which bones and teeth are made.

The form of life the researchers believe they have discovered was probably a simple microorganism, although its actual shape or nature cannot be ascertained, Mojzsis said, because heat and pressure over time have destroyed any original physical structure of the organisms.

Harrison said of UCLA's ion microprobe and the research: "The individual samples are very small, and no other instrument would have been sensitive enough to reveal precisely the isotopic composition and location of the carbon inclusions in the rock."

It is unknown when life first appeared on Earth, which is approximately 4.5 billion years old.

The residue of ancient life that the scientists believe they have found existed prior to the end of the "late heavy bombardment" of the Moon by large objects, a period which ended approximately 3.8 billion years ago, Harrison noted.

"Life is tenacious, and it completely permeates the surface layer of the planet," Mojzsis said. "We find life beneath the deepest ocean, on the highest mountain, in the driest desert and the coldest glacier, and deep down in the crustal rocks and sediments."

An unanswe
'"/>

Source:University of California - Los Angeles


Page: 1 2 3 4 5

Related biology news :

1. Wisconsin scientists grow critical nerve cells
2. UCSB scientists probe sea floor venting to gain understanding of early life on Earth
3. UAB scientists discover the origin of a mysterious physical force
4. Fox Chase Cancer Center scientists identify immune-system mutation
5. Weizmann Institute scientists develop a new approach for directing treatment to metastasized prostate cancer in the bones.
6. U-M scientists find genes that control growth of common skin cancer
7. UCLA scientists transform HIV into cancer-seeking missile
8. RNA project to create language for scientists worldwide
9. Carnegie Mellon scientists develop tool that uses MRI to visualize gene expression in living animals
10. To control germs, scientists deploy tiny agents provocateurs
11. Leprosy microbes lead scientists to immune discovery
Post Your Comments:
*Name:
*Comment:
*Email:
TAG: UCLA scientists strengthen case for life more than billion years ago

(Date:9/30/2014)... conducted by the Ocean Health Index rates the ... overall health. In addition, for the first time, ... ocean regions beyond national jurisdiction (high-seas areas) ... safeguarding biodiversity and providing sustainable food sources. , ... a partnership led by scientists from UC Santa ...
(Date:9/30/2014)... Calif. The National Institutes of Health (NIH) ... today to develop an electrode array system that ... brain works through unprecedented resolution and scale. , ... to support President Obama,s BRAIN (Brain Research ... research effort to revolutionize our understanding of the ...
(Date:9/30/2014)... Prenatal exposure to tetrachloroethylene (PCE) in drinking water ... abruption, according to a new study led by ... , The study, published in the journal ... 1,019 unexposed pregnancies among 1,766 women in Cape ... late 1960s to the early 1980s by the ...
Breaking Biology News(10 mins):Rating the planet's oceans 2Rating the planet's oceans 3NIH taps lab to develop sophisticated electrode array system to monitor brain act 2NIH taps lab to develop sophisticated electrode array system to monitor brain act 3Contaminated water linked to pregnancy complications, BU study finds 2
... WEST LAFAYETTE, Ind. - Hybrid plants with multiple genome ... one ancient parent over the genes of the other parent, ... eventually are deleted. Brian Dilkes, an assistant professor of ... at the University of California Davis and University of Southern ...
... Institute Assistant Professor of Biomedical Engineering Deanna Thompson is ... as part of the state stem cell research program, ... program is New York,s $600 million publicly funded grant ... stem cells. Working at the interface of engineering ...
... have long been at the core of biomedical research, allowing ... in non-human subjects. In the ideal, such models ... Parkinson,s disease observed in a rat model would be virtually ... course, is that rats aren,t human, and few models actually ...
Cached Biology News:Study shows how plants sort and eliminate genes over millennia 2Rensselaer professor utilizing New York state grant to study adult stem cells 2Rensselaer professor utilizing New York state grant to study adult stem cells 3What's in a name? Broadening the biological lexicon to bolster translational research 2What's in a name? Broadening the biological lexicon to bolster translational research 3
(Date:10/1/2014)... , Oct. 1, 2014  Pressure BioSciences, Inc. ... in the development and sale of high pressure-based sample ... announced it has been invited to present at the ... Warsaw , Poland.  The Conference will take ... 2014.  Mr. Richard T. Schumacher , President and ...
(Date:10/1/2014)... Md. , Oct. 1, 2014  Spherix ... to the fostering and monetization of intellectual property, ... litigation against VTech and Uniden in the U.S. ... Texas has been rescheduled for ... for October 2, 2014.  The Court Order setting ...
(Date:10/1/2014)... As the world takes its first steps into the ... century would mark the beginning of a new era of ... fact that the world is experiencing a rapid rise in ... Almost half of these chronic conditions are due to lifestyle ... care and intervention. While the world is experiencing a rapid ...
(Date:10/1/2014)... September 30, 2014 Today the ... round of grants for the Brain Research through ... aims to develop and revolutionize new methods of ... the human brain. This first round of grants ... 2014 was allocated to more than 100 investigators ...
Breaking Biology Technology:Pressure BioSciences, Inc. Invited to Present at the 2nd Global Life Sciences Conference in Warsaw, Poland 2Pressure BioSciences, Inc. Invited to Present at the 2nd Global Life Sciences Conference in Warsaw, Poland 3Pressure BioSciences, Inc. Invited to Present at the 2nd Global Life Sciences Conference in Warsaw, Poland 4Markman Hearing Date for VTech and Uniden Litigation Now Set for November 10, 2014 2Fighting Mortality and Morbidity of Chronic Health Disorders during Open Access Week 2Fighting Mortality and Morbidity of Chronic Health Disorders during Open Access Week 3NIH Awards 15 Grants to CHI Members for BRAIN Initiative Research 2NIH Awards 15 Grants to CHI Members for BRAIN Initiative Research 3
... - Appointment of Company Officers ... ... ... at its Annual Shareholder Meeting held on,November 7 2007, Monica R. Brettler, Tush P. Nikollaj, Carl H. Rosner and,Arthur ...
... 20 MannKind,Corporation (Nasdaq: MNKD ), focused on ... today that it,will present at the Piper Jaffray Healthcare ... the Pierre Hotel in New York, NY. Interested ... cast of the,presentation in the Investor Relations section of ...
... Acquisition Reflected in Q3 Results, FRANKLIN, Mass., Nov. ... announced financial results for the,third quarter ended September 30, ... was $8,677,000 or $.70 per share, compared to $1,390,000 ... For the nine months ended,September 30, 2007, net loss ...
Cached Biology Technology:CardioMag Announces Results of 2006 Annual Shareholders Meeting and Board Meeting 2Echo Therapeutics Reports Third Quarter 2007 Results 2Echo Therapeutics Reports Third Quarter 2007 Results 3Echo Therapeutics Reports Third Quarter 2007 Results 4Echo Therapeutics Reports Third Quarter 2007 Results 5Echo Therapeutics Reports Third Quarter 2007 Results 6
Anti-MMP-25 (Membrane-type MMP-6, Mt6MMP), hinge region; rabbit host...
Anti-MMP-25 (Membrane-type MMP-6, Mt6MMP), hinge region; rabbit host...
Desmosomal Protein Immunogen: Full length, native protein purified from human epidermal keratins. Storage: -20 C, Avoid Freeze/Thaw Cycles...
PPIF Antibody...
Biology Products: