* Astronomy

Members Login
Post Info TOPIC: Nakhlites


L

Posts: 131433
Date:
RE: Nakhlites
Permalink  
 


The Nakhla meteorite is on display in the Natural History Museum, in London.

The microscopic aliens are on a slice of a meteorite in the museum.
Nasa scientists, who used a scanning electron microscope to take snaps, say the bumpy surface resembles a fossilised colony of microbacteria a simple form of life.
The meteorite from Mars fell on Egypt in 1911.
Last month it emerged that Nasa scientists believe Martian bacteria arrived on Earth on a meteorite which smashed into the Antarctic 13,000 years ago.

Read more

__________________


L

Posts: 131433
Date:
Permalink  
 

New Study Adds to Finding of Ancient Life Signs in Mars Meteorite
Using more advanced analytical instruments now available, a Johnson Space Centre research team has re-examined the 1996 finding that a meteorite contains strong evidence that life may have existed on ancient Mars.
The new research focused on investigating alternate proposals for the creation of materials thought to be signs of ancient life found in the meteorite. The new study argues that ancient life remains the most plausible explanation for the materials and structures found in the meteorite.

Source

Published articles
Origins of magnetite nanocrystals in Martian meteorite ALH84001
View article (PDF 15 Mb)
Erratum (PDF 48 Kb)
Electronic Annex EA-1 (PDF 32 Kb)
Electronic Annex EA-2 (PDF 118 Kb)
Electronic Annex EA-3 (PDF 110 Kb)
Electronic Annex EA-4 (PDF 271 Kb)
Electronic Annex EA-5 (PDF 312 Kb)
Electronic Annex EA-6 (PDF 90 Kb)
Life on Mars: New Evidence from Martian Meteorites
View article (PDF 10 Mb)


__________________


L

Posts: 131433
Date:
Permalink  
 

A 13,000 year old meteorite from Mars, found in 1984 in the Allan Hills Region of Antarctica, is back in the news. The rock caused quite a stir when NASA announced during an August 1996 press conference that it contained evidence of past life on Mars.
The first paper in Science described micrometer-sized carbonate deposits, shaped like pancakes, along tiny cracks and crevices in the meteorite, known as ALH84001. Researchers theorized that the carbonates were deposited from carbon dioxide-saturated fluids that were no more than 100 degrees Celsius -- the temperature around which microorganisms on Earth flourish.


Read more

__________________


L

Posts: 131433
Date:
Permalink  
 

Scientists have discovered compelling new evidence that life has existed on Mars and was brought to Earth in an ancient meteorite.
State-of-the-art instruments and techniques reveal that tiny fossils in the rock found in Antarctica are microscopic aliens and not produced by other effects.
The meteorite found in the Antarctic's deep freeze is called Allan Hills 84001. It hit the headlines 13 years ago in 1996 because of the peculiar fossils it appeared to contain.

Read more

__________________


L

Posts: 131433
Date:
Permalink  
 

A Martian meteorite discovered in Antarctica in 1992 contained traces of fossils of ancient organisms that lived on Mars. 
The meteorite, ALH or Allen Hills 84001, has long been known to scholars, who have been investigating it since the early 90s.
However until now nobody had found trace fossils.

Read more (Italian)

__________________


L

Posts: 131433
Date:
Allen Hills ALH84001
Permalink  
 


A rather surprising and more recent observation is that the crystal morphology of the magnetofossils may yield information about relative climatic change. Both Hesse (1994) and Yamazaki and Kawahata (1998) found systematic variations in magnetosome shape that correlated nicely with Pleistocene climatic fluctuations in deep-sea Pacific sediments. These may represent slight differences in the bacterial species composition of the deep-sea benthic environment that fluctuate with time.
One of the most interesting debates involving magnetofossils concerns their use by McKay et al. (1996) as biomarkers in the ALH84001 Martian meteorite. This is clearly the most interesting and innovative use of potential magnetosomes as a biomarker
.
Read more

__________________


L

Posts: 131433
Date:
ALH 84001
Permalink  
 


Martian meteorite may have held life
MORE than a decade after the furore over a Martian meteorite that some claimed contained fossil microbes, a new analysis suggests the rock's environment on Mars was conducive to life.
In 1996, some scientists argued that ALH 84001, a Martian rock found in Antarctica, contained complex carbon-based molecules and some microscopic markings shaped like bacteria.

Read more

__________________


L

Posts: 131433
Date:
Nanobes
Permalink  
 


Few things have stirred up as much controversy among scientists as the reliability of meteorite fragments as records of ancient life. in 1997 NASA held lectures on the subject of nanobes from Mars.

Read more

__________________


L

Posts: 131433
Date:
NWA 482
Permalink  
 


Dickinsons Dakota Dinosaur Museum is focusing on meteorites and related specimens during the 2008 season.
One specimen you wont want to miss is the Martian meteorite fragment. Based on its chemical composition, this fragment of basalt was once a part of Mars.

Read more

__________________


L

Posts: 131433
Date:
RE: Nakhlites
Permalink  
 


Between three and four billion years ago, Mars was a lot like Earth. Both planets are believed to have had surface water. Those similarities make it a prime candidate for extraterrestrial life.

The assumption is that if bacterial life emerged on Earth at that time, then why not on Mars? - Soon Sam Kim, principal member of technical staff at NASAs Jet Propulsion Laboratory.

Read more

__________________
«First  <  1 2 3 4 5  >  Last»  | Page of 5  sorted by
Quick Reply

Please log in to post quick replies.



Create your own FREE Forum
Report Abuse
Powered by ActiveBoard