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Science and Technology "Somewhere, something incredible is waiting to be known." - Carl Sagan.

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Old July 29 2013, 04:29 PM   #16
137th Gebirg
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Re: New 4th Domain of Life discovered?

Is this the thing that some folks postulated a couple of weeks back might have arrived here from a piece of Mars or an asteroid or something, due to its unique nature?
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Old July 30 2013, 12:34 AM   #17
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Re: New 4th Domain of Life discovered?

^I think it's highly unlikely it came from Mars, or even a completely separate biogenesis. That's because, as a virus that uses the cellular machinery of another cell, it of necessity must use the same genetic code, nucleic acids, and amino acids as other forms of life. A completely separate biogenesis event, whether on this planet, or another, would almost certainly use a different genetic code and likely a different set of amino acids and nucleic acids.
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Old July 30 2013, 01:06 AM   #18
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Re: New 4th Domain of Life discovered?

farmkid wrote: View Post
A completely separate biogenesis event, whether on this planet, or another, would almost certainly use a different genetic code and likely a different set of amino acids and nucleic acids.
Unless there's anything to panspermia.
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Old July 30 2013, 02:02 PM   #19
farmkid
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Re: New 4th Domain of Life discovered?

If there's anything to the idea of panspermia, then there would have been only one biogenesis event in the galaxy. That idea goes the opposite direction of arguing for a separate biogenesis for these viruses.
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Old July 30 2013, 04:41 PM   #20
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Re: New 4th Domain of Life discovered?

farmkid wrote: View Post
If there's anything to the idea of panspermia, then there would have been only one biogenesis event in the galaxy.
No, there could be many ongoing biogenesis events continually still contributing to a panspermia scenario
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Old July 30 2013, 09:02 PM   #21
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Re: New 4th Domain of Life discovered?

^ Well, I suppose so, but panspermia is more or less based on the idea that biogenesis is rare and that life in the universe is dispersed by dust/comets/asteroids/etc. Panspermia suggests that life on Earth came from somewhere else and that biogenesis did not happen on Earth. The point remains that if there is anything to the idea of panspermia, it argues against the idea of these viruses arising from a separate biogenesis event.
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