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tonyman1989
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 Posted: Thu Jun 21, 2007 8:44 pm Post subject: orgin of life? |
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anyone know want current thoeries are to how it happened?
please post any links.
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sjc
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| Posted: Thu Jun 21, 2007 8:54 pm Post subject: |
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Look up abiogenesis as a good start.
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tonyman1989
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| Posted: Thu Jun 21, 2007 8:55 pm Post subject: |
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| sjc wrote: | | Look up abiogenesis as a good start. |
thank you.
_________________
"If people are good only because they fear punishment, and hope for a reward, then we are a sorry lot indeed." Albert Einstein
"For then we will know the mind of God." Stephen Hawking
"We admit that we are like apes, but we seldom realise that we are apes." Richard Dawkins |
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Nimitz
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| Posted: Thu Jun 21, 2007 9:16 pm Post subject: |
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FlatEarth1024
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| Posted: Thu Jun 21, 2007 9:20 pm Post subject: |
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I have an ORGAN of life. Does that count?
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sjc
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| Posted: Thu Jun 21, 2007 9:21 pm Post subject: |
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America is not worth the effort anymore. RIP. It was suicide. |
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tonyman1989
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| Posted: Thu Jun 21, 2007 10:00 pm Post subject: |
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does it really matter?
_________________
"If people are good only because they fear punishment, and hope for a reward, then we are a sorry lot indeed." Albert Einstein
"For then we will know the mind of God." Stephen Hawking
"We admit that we are like apes, but we seldom realise that we are apes." Richard Dawkins |
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Gettin' In Tune
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| Posted: Fri Aug 24, 2007 10:18 pm Post subject: |
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Due to the article that "scientist predict artificial life in 3 to 10 years" I just started to exam all the origin of life models. http://abcnews.go.com/Technology/WireStory?id=3499486&page=2 There is a list of various origin of life models on wikipedia: http://en.wikipedia.org/wiki/Origin_of_life
The article gave no clear indication on how the scientists are proposing to synthetically replicate nucleotides and led me to a few question which I hope someone is able to asnwer. What specific nucleotide are they trying create? Are these nucleotides linked polycyclic aromatic hydrocarbons (PAH) or something else? Does this fit into the PAH world hypothesis or another origin of life hypothesis. What origin of life model does this scientific experiment support?
I was reading up on the PAH world hypothesis. The PAH world hypothesis is a biological hypothesis that proposes that PAHs are a means for a pre-RNA World basis for the origin of life. As yet it is untested. Then I started to research the PAH hypothesis and found this interesting:
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While organic compounds have been discovered in meteorites that have landed on Earth, this is the first direct evidence for the presence of complex, important biogenic compounds in space. So far evidence suggests that PANHs are formed in the winds of dying stars and spread all over interstellar space.
"This stuff contains the building blocks of life, and now we can say they're abundant in space," Hudgins said. "And wherever there's a planet out there, we know that these things are going to be raining down on it. It did here and it does elsewhere...."
....But swap a carbon atom with a nitrogen and a PAH becomes a PANH, a class of molecules critical to humans. Without nitrogen, it would be impossible to build amino acids, proteins, DNA, RNA, hemoglobin, and many other important molecules. |
Source: http://www.space.com/scienceastronomy/051018_science_tuesday.html |
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