HOME >> BIOLOGY >> NEWS
New research questions evidence for earliest life on earth

d. Fedo and Whitehouse liken the process of making the fine layering akin to stretching a lump of bubble gum into a thin strand.

A chemical study of the rocks also points away from a BIF origin for the banded rock. Analyses of the green bands show that the composition is very similar to a primitive rock called komatiite, a relative of basalt, which formed as molten rock solidified. Such rocks form at temperatures far too high for living organisms, hence there is little chance that the preserved graphite represents past life. The white layers are thought to be veins of quartz that were subsequently introduced into the green bands.

Recent studies of hydrothermal vents on mid-ocean ridges have also shown that basalt-like rocks can interact with water to form carbon compounds by non-biological processes, leaving an isotopic signature similar to that of metabolic function. While it is possible life existed on Earth when the rocks on Akilia formed, direct evidence for life older than approximately 3.8 billion years ago is still lacking.

No one knows when life on Earth originated. The earliest history of the Earth is one dominated by many violent asteroid impacts, some of which would have been capable of entirely boiling off all water on the planet, including the oceans, and sterilizing the planet of all life.

Such a scenario suggests that life may have originated and been exterminated a number of times before the last major impact, which perhaps occurred around 3.8 billion years ago, near the time when the rocks on Akilia solidified.

From a first impression of their great age, these rocks then represent an ideal target for studying the remains of the earliest life on Earth.

However, the study by Fedo and Whitehouse, along with a recent study about the claimed earliest body fossils, indicates that discovering a preserved relic of the earliest life on Earth remains elusive, and that great caution is warranted in working with sa
'"/>

Contact: Bob Ludwig
bludwig@gwu.edu
202-994-3566
George Washington University
23-May-2002


Page: 1 2 3

Related biology news :

1. Leader in cancer treatment and prevention research honored
2. UT Southwestern receives $1.78 million grant for obesity research as part of NIH Roadmap initiative
3. Scientists to prototype cyberinfrastructure for research and education access to ocean observatories
4. Belgian researchers explore revolutionary approach to angiogenesis
5. Award winning researchers reveal potential new role for Glivec
6. New research shows plants can shuffle and paste gene pieces to generate genetic diversity
7. 16 APS exercise research highlights, from reduced flu mortality to proteomics & obesity
8. Gene chips research in cotton could lead to superior variety
9. Groundbreaking research could ignite new solutions to heat transfer in nano-devices
10. New hydrothermal vents discovered as South Pacific Odyssey research begins
11. University of Alberta researcher looks for clues to mysterious disease

Post Your Comments:
*Name:
*Comment:
*Email:


(Date:11/3/2018)... ... November 01, 2018 , ... The Conference Forum ... held February 6-8, 2019 at the Crowne Plaza Times Square in New York ... session is Genentech’s Global Franchise Leader in Cancer Immunotherapy Biomarkers and IO360° Plenary ...
(Date:11/3/2018)... ... , ... Karius , the leading infectious disease genomics company, is offering ... pediatric patients. One grant of up to $50,000 will be awarded to a research ... In addition to the funding, Karius will cover the cost of sequencing a limited ...
(Date:11/3/2018)... ... , ... As 2018 comes to a close, significant changes to medical device ... for manufacturers worldwide. To mark World Quality Day this month, Boulder iQ ... may sound far off, the May 26 deadline transition deadline that year for the ...
Breaking Biology News(10 mins):
(Date:10/31/2018)... ... October 30, 2018 , ... The assessment ... very important aspect of experimental biology. Reproducibility of cell-based assays is one of ... choosing the appropriate assay type, there are many more factors to be considered ...
(Date:10/29/2018)... ... ... PracticeMatch , a company that provides the nation’s largest physician recruitment marketing ... 2019. The company has expanded its offering of virtual (online) recruiting events for the ... which have the highest concentrations of resident and fellow physicians. , The schedule ...
(Date:10/24/2018)... (PRWEB) , ... October 22, 2018 , ... ... today announces the company’s Lunula Laser was featured on an episode of ... , Board-certified dermatologist, Dr. Glynis R. Ablon, MD , discusses and demonstrates ...
(Date:10/24/2018)... ... October 22, 2018 , ... ... and medical experts from around the world, will host its first Annual ... best practices in testing, chromatography, centrifugation, as well as developments in chemical sensors ...
Breaking Biology Technology:
Cached News: