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Thread: Nasa to make announcement about possible ET life find on Thursday

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    Re: NASA to announce "major discovery" that could boost chances of life on other worl

    From the little information I can glean from what's been released so far, it doesn't sound like the announcement is arsenic-vs-carbon. It sounds more like arsenic-vs-phosphorus. Phosphorus is a critical ingredient in DNA and ATP (the source of cellular energy for all known life). Arsenic is much more volatile
    Okay, so that aside, these "microbes" still have a cell membrane, nucleus, etc?
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    Re: NASA to announce "major discovery" that could boost chances of life on other worl

    Here's an interesting article from about a year ago, where Astrobiology Magazine was speculating about the possibility of arsenic-based life in this very lake. They feature an interview with one of the women scheduled to speak at NASA's press conference tomorrow.

    Searching for Alien Life, on Earth

    Just to be clear: finding an organism that didn’t need phosphorus, that used arsenic instead, would be one of the most significant scientific discoveries of all time. It would mean that Mono Lake was home to a form of life biologically distinct from all other known life on Earth. It would strongly suggest that life got started on our planet not once, but at least twice, that the origin of life on Earth was not a freak accident requiring highly specialized circumstances, but a relatively commonplace event. And that in turn would strengthen the argument that life is likely to be present on other worlds as well. Not too shabby a result for an afternoon stroll by a mountain lake.
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    Re: NASA to announce "major discovery" that could boost chances of life on other worl

    Quote Originally Posted by kaya'08 View Post
    Okay, so that aside, these "microbes" still have a cell membrane, nucleus, etc?
    That I don't know. Maybe we'll find out tomorrow.
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    Re: NASA to announce "major discovery" that could boost chances of life on other worl

    Never use the Daily Mail as a source for anything. It's true that selection pressures are different now, but that doesn't mean we're done evolving.

    Quote Originally Posted by marduc View Post
    after browsing the article it seems the linked telegraph article, it seems it is still carbon based life, so this is along the lines of finding sulfur dependent bacteria in deep cave systems, it just shows the variability of present life is wider than we thought. This is no profound discovery with implications for multiple instances of abiogenesis, this is just showing that life can live in a much larger range of environments than previously thought. still pretty significant, just not mega-significant.
    We won't know for sure until the announcment.

    Quote Originally Posted by Heavy Duty View Post
    I doubt it unless its withstand the extreme heat from the sun.
    Mercury is unlikely, but the idea is that life could survive in a lot more types of environments than ours. Mercury has no atmosphere and some really extreme temperature variations.
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    Re: NASA to announce "major discovery" that could boost chances of life on other worl

    Quote Originally Posted by Kandahar View Post
    That I don't know. Maybe we'll find out tomorrow.
    Assuming this is the case, the only difference between them and us is that we use Protien and they use Arsenic in DNA/energy. Doesn't sound like we are worlds apart, to be honest.
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    Re: NASA to announce "major discovery" that could boost chances of life on other worl

    Quote Originally Posted by Kandahar View Post
    That's not my interpretation from the article. I agree that it sounds like carbon-based life, but with a crucial difference: it uses arsenic instead of phosphorus in its equivalent of DNA and ATP. That would indicate that it has nothing in common with other forms of life.
    but that does not necessarily point to a second abiogenesis, it could be just adaptations and the substitution of phosphorus with arsenic, it does not mean a rewriting of everything, it is just adapting to utilize an element that is in the same group instead. You find similar in biology (albeit not with such profound implications) with magnesium replacing calcium

    yes it is still very significant, but on the surface (we will see with the announcement the devil is in the details) it does not necessarily suggest a secondary abiogenisis (although it would be awesome if the details do point that way)
    Last edited by marduc; 12-01-10 at 09:13 PM.
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    Re: NASA to announce "major discovery" that could boost chances of life on other worl

    Quote Originally Posted by kaya'08 View Post
    Assuming this is the case, the only difference between them and us is that we use Protien and they use Arsenic in DNA/energy. Doesn't sound like we are worlds apart, to be honest.
    Uhh, that's a pretty serious and fundamental difference. An entirely different form of DNA is going to be an entirely different form of life.
    He touched her over her bra and underpants, she says, and guided her hand to touch him over his underwear
    Quote Originally Posted by Lutherf View Post
    We’ll say what? Something like “nothing happened” ... Yeah, we might say something like that.

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    Re: NASA to announce "major discovery" that could boost chances of life on other worl

    Quote Originally Posted by Deuce View Post
    Uhh, that's a pretty serious and fundamental difference. An entirely different form of DNA is going to be an entirely different form of life.
    I just dont get how two different life forms that evolved from two completely different things, whatever that may be, still share the same biological characteristics like a cell wall, nucleus that stores DNA etc. That would suggest some form of common ancestry SOMEWHERE down the line, which would mean its still pretty exclusive to Earth. Hypothetically speaking of course.
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    Re: NASA to announce "major discovery" that could boost chances of life on other worl

    Quote Originally Posted by Kandahar View Post
    Here's an interesting article from about a year ago, where Astrobiology Magazine was speculating about the possibility of arsenic-based life in this very lake. They feature an interview with one of the women scheduled to speak at NASA's press conference tomorrow.

    Searching for Alien Life, on Earth
    thank you for this, this shines a bit more light into things.
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    Re: NASA to announce "major discovery" that could boost chances of life on other worl

    Quote Originally Posted by Kandahar View Post
    Alien life form ‘is here on Earth’ | Skymania News and Guide



    Twitter is going berserk tonight, with rumors that NASA is planning to announce the discovery of arsenic-based life on earth. For those who haven't taken biology in a while, all known life is based on carbon atoms (i.e. DNA). If this is what NASA announces tomorrow, it is a huge bombshell that will make us question everything we've previously thought about how life evolves. Arsenic-based life would be totally alien from anything previously known to science.

    Furthermore, it would mean that life evolved at least TWICE on earth...meaning that abiogenesis is probably far more common than previously thought.
    Cool - but I'm not confused.

    Didn't they have a revelation when they discovered bacteria that thrived without oxygen?
    As well as microbes and sea-cumbers that reveled in heat vents and plumes on the ocean floor?
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