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Two dust particles from the Murchison meteorite which fell to Earth in Australia in 1969.  (Source: Argonne National Laboratory, Department of Energy)
New evidence suggests that basic life really may have come from the stars.

It has long been thought that the seeds for life came to a primordial Earth from solar system leftovers crashing into the planet. These meteorites, comets, or other unknowns may have contained vital components with which budding life on Earth either assimilated or used as a catalyst to create itself. Now, in a paper to be published in Earth and Planetary Science Letters, European scientists claim they have evidence to prove the theory may be correct.

The group, based at Imperial College London, found some of the base building blocks for life, nucleobases, in dust from the Murchison meteorite which fell to Earth in 1969. Nucleobases, in this case uracil and xanthine, are the components that make up two of the most important parts of any Earth-bound life form, DNA and RNA.

In order to confirm that these molecules weren't from simple contamination, the researchers analyzed the individual atoms of the nucleobases. They found the carbon contained within was a heavier breed that what forms naturally on Earth. The molecules must have come from space.

Professor Mark Sephton, a co-author of the paper states “Because meteorites represent left over materials from the formation of the solar system, the key components for life -- including nucleobases -- could be widespread in the cosmos. As more and more of life’s raw materials are discovered in objects from space, the possibility of life springing forth wherever the right chemistry is present becomes more likely.”

While giving insights on how higher life may have formed on Earth, the finding may also bolster the theory that life may have once existed on a warmer, wetter Mars or a cooler, clearer Venus. NASA hopes to find evidence for such theories by analyzing the ice contained in the soil of the red wasteland that the Mars Phoenix Lander touched down on.



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RE: Ehhh
By PlasmaBomb on 6/16/2008 6:23:38 AM , Rating: 5
quote:
Isn't it kind of obvious where we're from?


Yes, it is blatantly obvious that in the future we play around with physics a bit too much and it goes horribly wrong, creating a time vortex which sends back some organic matter to the early earth.

This then creates life as we know it and results in the biggest paradox in the universe, and essentially means we are our own "God"...


RE: Ehhh
By Mitch101 on 6/16/2008 10:53:22 AM , Rating: 2
All we are is Dust in the Wind Dude!

http://www.youtube.com/watch?v=2EwaFkPMdlY


RE: Ehhh
By deeznuts on 6/16/2008 2:13:48 PM , Rating: 2
whew, I thought you were going to link to Dustin Nguyen!


RE: Ehhh
By GhandiInstinct on 6/16/2008 10:55:18 AM , Rating: 2
The environment on "early earth" could not sustain life as it was too violent and erradic.


RE: Ehhh
By ADDAvenger on 6/16/2008 11:01:37 AM , Rating: 2
Well apparantly not, seeing as we're here and all ;)


RE: Ehhh
By flutedude2005 on 6/16/2008 11:35:12 AM , Rating: 2
YOU'RE too violent and erratic!!!


RE: Ehhh
By overzealot on 6/16/2008 2:12:44 PM , Rating: 2
So's your face!


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