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  #1  
Old 12-02-2010, 05:00 AM
szebus szebus is offline
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Default NASA Announces Extraterrestrial Life

NASA announces about extraterrestrial life

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Dwayne Brown
Headquarters, Washington
202-358-1726
dwayne.c.brown@nasa.gov

Cathy Weselby
Ames Research Center, Moffett Field, Calif.
650-604-2791
cathy.weselby@nasa.gov
Nov. 29, 2010

MEDIA ADVISORY : M10-167


NASA Sets News Conference on Astrobiology Discovery; Science Journal Has Embargoed Details Until 2 p.m. EST On Dec. 2


WASHINGTON -- NASA will hold a news conference at 2 p.m. EST on Thursday, Dec. 2, to discuss an astrobiology finding that will impact the search for evidence of extraterrestrial life. Astrobiology is the study of the origin, evolution, distribution and future of life in the universe.

The news conference will be held at the NASA Headquarters auditorium at 300 E St. SW, in Washington. It will be broadcast live on NASA Television and streamed on the agency's website at http://www.nasa.gov.

Participants are:
- Mary Voytek, director, Astrobiology Program, NASA Headquarters, Washington
- Felisa Wolfe-Simon, NASA astrobiology research fellow, U.S. Geological Survey, Menlo Park, Calif.
- Pamela Conrad, astrobiologist, NASA's Goddard Space Flight Center, Greenbelt, Md.
- Steven Benner, distinguished fellow, Foundation for Applied Molecular Evolution, Gainesville, Fla.
- James Elser, professor, Arizona State University, Tempe

Media representatives may attend the conference or ask questions by phone or from participating NASA locations. To obtain dial-in information, journalists must send their name, affiliation and telephone number to Steve Cole at stephen.e.cole@nasa.gov or call 202-358-0918 by noon Dec. 2.

For NASA TV streaming video and downlink information, visit:

http://www.nasa.gov/ntv



For more information about NASA astrobiology activities, visit:

http://astrobiology.nasa.gov



- end -

Last edited by szebus : 12-02-2010 at 02:04 PM.
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  #2  
Old 12-02-2010, 02:09 PM
szebus szebus is offline
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Default NASA-Funded Research Discovers Life Built With Toxic Chemical

NASA-Funded Research Discovers Life Built With Toxic Chemical

Quote:
Dwayne Brown
Headquarters, Washington
202-358-1726
dwayne.c.brown@nasa.gov

Cathy Weselby
Ames Research Center, Moffett Field, Calif.
650-604-2791
cathy.weselby@nasa.gov


Dec. 02, 2010

RELEASE : 10-320


NASA-Funded Research Discovers Life Built With Toxic Chemical


WASHINGTON -- NASA-funded astrobiology research has changed the fundamental knowledge about what comprises all known life on Earth.

Researchers conducting tests in the harsh environment of Mono Lake in California have discovered the first known microorganism on Earth able to thrive and reproduce using the toxic chemical arsenic. The microorganism substitutes arsenic for phosphorus in its cell components.

"The definition of life has just expanded," said Ed Weiler, NASA's associate administrator for the Science Mission Directorate at the agency's Headquarters in Washington. "As we pursue our efforts to seek signs of life in the solar system, we have to think more broadly, more diversely and consider life as we do not know it."

This finding of an alternative biochemistry makeup will alter biology textbooks and expand the scope of the search for life beyond Earth. The research is published in this week's edition of Science Express.

Carbon, hydrogen, nitrogen, oxygen, phosphorus and sulfur are the six basic building blocks of all known forms of life on Earth. Phosphorus is part of the chemical backbone of DNA and RNA, the structures that carry genetic instructions for life, and is considered an essential element for all living cells.

Phosphorus is a central component of the energy-carrying molecule in all cells (adenosine triphosphate) and also the phospholipids that form all cell membranes. Arsenic, which is chemically similar to phosphorus, is poisonous for most life on Earth. Arsenic disrupts metabolic pathways because chemically it behaves similarly to phosphate.

"We know that some microbes can breathe arsenic, but what we've found is a microbe doing something new -- building parts of itself out of arsenic," said Felisa Wolfe-Simon, a NASA astrobiology research fellow in residence at the U.S. Geological Survey in Menlo Park, Calif., and the research team's lead scientist. "If something here on Earth can do something so unexpected, what else can life do that we haven't seen yet?"

The newly discovered microbe, strain GFAJ-1, is a member of a common group of bacteria, the Gammaproteobacteria. In the laboratory, the researchers successfully grew microbes from the lake on a diet that was very lean on phosphorus, but included generous helpings of arsenic. When researchers removed the phosphorus and replaced it with arsenic the microbes continued to grow. Subsequent analyses indicated that the arsenic was being used to produce the building blocks of new GFAJ-1 cells.

The key issue the researchers investigated was when the microbe was grown on arsenic did the arsenic actually became incorporated into the organisms' vital biochemical machinery, such as DNA, proteins and the cell membranes. A variety of sophisticated laboratory techniques were used to determine where the arsenic was incorporated.

The team chose to explore Mono Lake because of its unusual chemistry, especially its high salinity, high alkalinity, and high levels of arsenic. This chemistry is in part a result of Mono Lake's isolation from its sources of fresh water for 50 years.

The results of this study will inform ongoing research in many areas, including the study of Earth's evolution, organic chemistry, biogeochemical cycles, disease mitigation and Earth system research. These findings also will open up new frontiers in microbiology and other areas of research.

"The idea of alternative biochemistries for life is common in science fiction," said Carl Pilcher, director of the NASA Astrobiology Institute at the agency's Ames Research Center in Moffett Field, Calif. "Until now a life form using arsenic as a building block was only theoretical, but now we know such life exists in Mono Lake."

The research team included scientists from the U.S. Geological Survey, Arizona State University in Tempe, Ariz., Lawrence Livermore National Laboratory in Livermore, Calif., Duquesne University in Pittsburgh and the Stanford Synchrotron Radiation Lightsource in Menlo Park.

NASA's Astrobiology Program in Washington contributed funding for the research through its Exobiology and Evolutionary Biology program and the NASA Astrobiology Institute. NASA's Astrobiology Program supports research into the origin, evolution, distribution and future of life on Earth.

For more information about the finding and a complete list of researchers, visit:

http://astrobiology.nasa.gov


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Old 12-06-2010, 05:42 AM
shawnchi shawnchi is offline
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Hmmm I hope at least SOME evidence is found within my life time :\ It'd be cool to know that we are the only living things in the entire Universe...

Hopefully Gliese 581c receives our message from Earth... Even if there is life there, we can't be sure it is an advanced race capable of sending messages back D: For all we know the Planet could be full of Tribal Age people... Or Medieval age people... Of maybe even just simple Bacteria... :\
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Old 12-06-2010, 09:54 AM
szebus szebus is offline
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I don't think that we are the only ones in this whole universe. There has to be other that will or already played games like Dawn of Fantasy. But seriously I don't think that we could be a single malformation of the universe.
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Old 12-06-2010, 09:59 AM
tim1983 tim1983 is offline
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Quote:
Originally Posted by shawnchi View Post
Hmmm I hope at least SOME evidence is found within my life time :\ It'd be cool to know that we are the only living things in the entire Universe...

Hopefully Gliese 581c receives our message from Earth... Even if there is life there, we can't be sure it is an advanced race capable of sending messages back D: For all we know the Planet could be full of Tribal Age people... Or Medieval age people... Of maybe even just simple Bacteria... :\
What is Gliese 581c??
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  #6  
Old 12-06-2010, 03:26 PM
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LiTos456 LiTos456 is offline
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http://en.wikipedia.org/wiki/Gliese_581_c

A simple search brought that up. It's a planet in another solar system that has similar characteristics to Earth and may be habitable for human-like species.
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Old 12-06-2010, 06:29 PM
shawnchi shawnchi is offline
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Quote:
Originally Posted by tim1983 View Post
What is Gliese 581c??
http://lmgtfy.com/?q=gliese+581c
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