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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 Flunk on 6/16/2008 12:41:41 PM , Rating: 0
The problem with that sort of information is that Wikipedia often doesn't list credible scientific sources (peer reviewed journals and the like).

Also, most authors post anonymously and we have no way of knowing their credentials. A tenured professor looks the same as a 10 year old child.

Without knowing where it is from, information is useless. This is why universities (and better high schools) do not accept Wikipedia articles as research sources.

So even if your claim was true (which I believe is probably statistically impossible that there are 0 mistakes) the problem of lack of accountability makes scientific information on Wikipedia a dicey proposition at best.


RE: Ehhh
By Adonlude on 6/16/2008 4:35:41 PM , Rating: 3
Holy crap people, drifting a bit! Asteriods, universe, life on earth, get back in the game here!


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