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:12/22/2018)... , ... December 21, 2018 , ... ... sponsored and hosted the Boston Healthcare Drinks event featuring Helen Chen, Greater China ... from China.” , The discussion was moderated by patent attorney David J. ...
(Date:12/19/2018)... ... 2018 , ... NDA Partners Chairman Carl Peck, MD, announced today that ... for Devices and Radiological Health (CDRH), has been appointed a Partner in the firm. ... she has more than 25 years of regulatory experience. In addition to her FDA ...
(Date:12/19/2018)... ... December 19, 2018 , ... OrthoSpace Ltd. (“OrthoSpace” or “the ... evaluating the use of novel surgical techniques, including the OrthoSpace InSpace™ balloon spacer, ... disabling condition for which there are historically few treatment options. The present study ...
Breaking Biology News(10 mins):
(Date:1/20/2019)... ... January 17, 2019 , ... TrakCel, the leading cell and ... Life Science Group (Quick Healthcare and QuickSTAT) today announce a partnership to offer ... and gene therapy industry to track products and manage the logistical processes of ...
(Date:1/15/2019)... ... 15, 2019 , ... With the U.S. Congress designating January as Cervical Health Awareness Month ... today announces tips to help reduce the risk of Cervical Cancer. , Cervical cancer ... is the #1 most common STD and an STI that almost half of ...
(Date:1/11/2019)... TORONTO (PRWEB) , ... January 11, 2019 , ... Drawing ... place on Tuesday, January 22, 2019 at 2:30pm EST will explore some of the ... and benefits of using one vendor vs. using multiple vendors, and find out how ...
(Date:1/10/2019)... (PRWEB) , ... January 08, ... ... Implant Co, (SAGICO), an innovative spinal implant company, announced today that SAGICO ... San Francisco, California. The annual J.P. Morgan Healthcare Conference is the ...
Breaking Biology Technology:
Cached News: