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Thread: Life-Zone

  1. #1 Life-Zone 
    Forum Junior Kolt's Avatar
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    Are there any life-forms that live in or near valcanic activity? If so then what kind?

    Where in, the most extreme envionments, have we found life or at least evidence of life? Deep ice? Underwater volcanic vents?

    What is the record threshold, that we know of, for any kind of organism to survive?


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  3. #2  
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    Maybe not inside a volcano but there is a domain of monera called archaea. They appear similar to bacteria but hae VERY different DNA and chemistry.

    They are found (& thrive) in extreme environments in very high temeratures & extremes of pH & pressure. As far as I know they are found growing in rocks of caves and in geysers well over 100 degrees C.


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  4. #3  
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    There is a difference between life surviving and life in active mode. Many bacteria, spores, etc, can be in a protected dormant state waiting for conditions to 'kick start' metabolism. The state of dormancy can be in response to any extreme of cold, heat, aridity, and so on.
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  5. #4  
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    Quote Originally Posted by Jellyologist
    There is a difference between life surviving and life in active mode. Many bacteria, spores, etc, can be in a protected dormant state waiting for conditions to 'kick start' metabolism. The state of dormancy can be in response to any extreme of cold, heat, aridity, and so on.
    i read somewhere that there was a dried up lake bed in austrailia that got reflooded with water, and all these shrimp eggs that were dormant hatched and the lake was full of shrimp again. I know its not bacteria, is there a name to the mechanism that keeps organisms dormant until they get activated?
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  6. #5  
    WYSIWYG Moderator marnixR's Avatar
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    the most interesting thing about the most primitive bacteria is that they require (not just tolerate) high temperatures

    i think this points to an origin of life either near thermal vents, or more likely, inside the earth's crust, where water has been found to be more abundant than previously thought
    "Reality is that which, when you stop believing in it, doesn't go away." (Philip K. Dick)
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  7. #6  
    Forum Freshman wonkothesane's Avatar
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    Thermophilus aquaticus is the usual example though probably not as extreme as you meant they live in geysers etc and their heat resistant polymerase is used for PCR. I think some lichens can dissolve the minerals from bare rock as their only source of nutrition and so can survive in the most barren environments. I remember reading about some type of bacteria that could survive at freezing point and secreted a chemical that could induce droplets of water to freeze. Also vaguely some plant or cyanobacteria that was the only living thing in the most saline part of the ocean, also rocks and glaciers I think .... so, yeah just about everywhere on earth except *in* volcanoes (that I know of).

    Try googling Pyrococcus furiosus, I found it on Wikipedia and is said to be found near Vulcano Island, Italy.

    I think johnny is talking about Lake Eyre (pronounceD like air), our (Australia's) largest lake. It regularly dries up and refills in the wet season whereupon brine shrimp hatch.
    Fry me a kipper skipper, I'll be back for breakfast!
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  8. #7 Re: Life-Zone 
    Universal Mind John Galt's Avatar
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    Quote Originally Posted by Kolt
    Where in, the most extreme envionments, have we found life or at least evidence of life?
    There have been suggestions that life has been observed at a Take That concert, but experts generally discount this.
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  9. #8 Re: Life-Zone 
    Forum Ph.D.
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    Quote Originally Posted by Ophiolite
    Quote Originally Posted by Kolt
    Where in, the most extreme envionments, have we found life or at least evidence of life?
    There have been suggestions that life has been observed at a Take That concert, but experts generally discount this.
    Stumble on through life.
    Feel free to correct any false information, which unknown to me, may be included in my posts. (also - let this be a disclaimer)
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