Intelligent life in the universe

Discussion in 'Astronomy, Exobiology, & Cosmology' started by AdamMc, Sep 17, 2011.

  1. nietzschefan Thread Killer Valued Senior Member

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    The Earth is not a home, it is a Womb.
     
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  3. Me-Ki-Gal Banned Banned

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    great minds think alike . I was going to say " Is there intelligent life in the Universe ? That is the first thing we have to prove . Now here you are Proof . So yeah intelligent life is a good Idea
     
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  5. Me-Ki-Gal Banned Banned

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    inside a home is a womb . Lets call it what it really is already . A house stores you when you are inside . How bout a shell ? A sea ? How bout that . A sea of oxygen and other substances. I got a question . Do your feet touch the ground ? At the most micro of levels is there a space between your feet and the ground ? At the smallest of atomic levels that is . I don't mean if you buried alive in dirt , or if your feet are stuck in the sand at the beach . Walking Along on the road ? Do your shoes actually touch ( Make full contact wit the ground ?
     
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  7. wellwisher Banned Banned

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    The two most plentiful molecules within the universe are H2 and H2O. Water is a very important part of life, as we know it. If you look at a plant seed, the organics remain dormant, until we add water. When the water rehydrates the organics, only then does life appear. Life will not happen without water, nor will it happen with any other solvent molecule.

    The H2, which is the most common molecule in the universe, just so happens to be at the upper energy limit of all molecules that life can use and produce for energy. I am not sure of much of life can produce or disgest H2 (some bacteria have been found for renewal energy), but H2 represents the upper energy limit of life. It is not coincidence that life chose the H2 as the energy limit and number two H20 as the animator.

    In terms of the commom atoms of the universe, the most common are H, He, O, C, Ne, Fe and N. Of these, H, O, C, N are good for proteins and nucleic acids. However DNA and RNA will need (P=phosphorous) which is very rare in comparison. This suggests animo acids and proteins could have been precursors for life as early as stage 1 stars.
     
  8. Deepuz Registered Senior Member

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    Like others have speculated, my opinion is that intelligent life indeed exists outside of our solar system. The trouble is that the vast distance between both stars and galaxies means that we are unlikely to see it. We could get a fluke, something like an interstellar travelling world (a la "Rendezvous With Rama") that happens across us within the human timespan. Or some kind of spacewarping technology is developed that allows us to transverse great distances. Both are unlikely. I'm still fascinated by the developments in extrasolar planet discovery. Cranking this up a notch or two over the next hundred years or so is the very best I'm hoping for. Seeing water on an extrasolar planet or the by products of aerobic life are starts. Of course, there are places much closer to home to be investigated such as Europa or Enceladus. Surely we must send probes there that are capable of penetrating and returning biological samples?
     
    Last edited: Sep 22, 2011
  9. get Registered Member

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    Has anyone seen the DVD “The Privileged Planet”? You can get it via Amazon or see it (I think) from youtube. Give it a try and yes you are supposed to think. I also find it interesting that the more exo-planets that are found limits the Earth-like planets that then COULD exist within the hot-Jupiters (and within the habitability zones) because the large gas giants would then perturb any stable orbit of the exo-earth like planet making that ‘earth’ unstable for life. That is intelligent life…and who cares about space bugs? We have enough problems with are own viruses and evasive planets and fire ants and killer bees to then be MESSING with ‘bugs’ from outer space taking up residence here.
     
  10. Deepuz Registered Senior Member

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    Hi get,

    I think the idea that most of the planets around stars are gas giants seems to be a given at the moment. The fact that we are now detecting rocky planets around relatively nearby stars is food for thought and quite encouraging.

    Not sure where you're going with the 'space bugs' thing. Any independent life, even if down to the level of an amoeba or spirogyra, was proved as hailing from outside our sphere of influence (the Earth) would be a revelation the likes of which has never been seen by mankind.
     
  11. KilljoyKlown Whatever Valued Senior Member

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    I like your response. Back to intelligence in the universe. My question would be how intelligent are we talking about? Are we talking just human level intelligence or something a bit higher than that? If there was an intelligence that had a way to travel anywhere in the universe within normal time frames. It seems likely that they would know we are here. So where are they? It's kind of the same question we have about time travel. If humans of the future have time travel, where are they?
     
  12. AdamMc Registered Member

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    Well my original question wasn't whether or not there is intelligent life out there, it was what would the earliest time intelligent life could have evolved was. I would define intelligent life as any race that is recognizable to us as civilized and intelligent. A life form that we could interact with, maybe share ideas, stories or technology with. So if they were roughly at our level of intelligence a few billion years ago, they will be way, way more evolved by now, to the point that their culture might even be incomprehensible to us.

    So why, if life is so abundant and evolved, have we never come in to contact with them? Like the time travel question, I think there could be a few different reasons why. First and most simply, maybe there isn't any intelligent life out there... unlikely in my opinion. Second, maybe intelligent life is scattered throughout the universe, but given its scale the nearest life has not yet had time to discover us. Another theory which is perhaps a little far fetched but in my opinion still possible, is that maybe they do know about us but are keeping a respectful distance, waiting until we are mature enough for them to disclose their presence, perhaps they seeded life on earth, perhaps they discovered a primitive evolving life form and decided to watch and wait to see what happened in some cosmic experiment. far fetched, yes, but given the vast depths of time we are considering, I believe anything is possible. What do you think?
     
  13. AdamMc Registered Member

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    Yeah, all realy interesting stuff. I dont think this is the best we could hope for in terms of finding complex life forms though. I think it was the SETI director that said he is confident, with the development of the sensitivity and power of our detection technology, that we will be able to detect a signal within the next 20 or 30 years. Of course if there is no signal there then no matter how powerful our equipment, we wont detect anything. But that is somthing that could come tomorrow with a fairly definitive answer as to whether there is an intelligent life form out there. Maybe we will pick up their tv or radio broadcasts. But what maybe more likely is that they have been beaming a message directly at earth for a long time which we haven't got the equipment to detect yet. In which case, maybe he is right. Assuming (and i do) that they have peaceful intentions (afterall we are talking about 'intelligent' life) they would want to attempt to communicate before they had even developed interstellar means of transport. I dont think they would rush somthing like meeting another race, what would be the point in coming all this way to say a jolly 'hi!' to be greeted by nuclear fallout from a jumpy and scared humanity, 'woops!'. Surely the first thing an intelligent race would do is to beam a steadily looping message instructing us how to create a device able to beam a message back allong with their coordinates. They would not have to have developed far beyond our capability to do this, they would just need to be able to detect planets likely to sustain life, which we are begining to be able to do now, and also have the ability to send some form of message, somthing they would likely do to all the possibly life carrying planets in their cosmic neighbourhood, gradualy widening their search as they developed the technology to do so. Dont you think thats the best we could hope for?!
     
    Last edited: Sep 23, 2011
  14. KilljoyKlown Whatever Valued Senior Member

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    We consider humans intelligent, but we have no idea how to move around in the universe fast enough to be much use to us and we don't know that we ever will be able to. Maybe there are other intelligent species out there in exactly the same boat we are in. If it is possible to move around fast enough, the question becomes how much time do we need to figure it out and will we have the time before some major disaster sets us back to start again. We don't even know enough to know how many worlds could support long time frames of biostability that could support intelligent life.
     
  15. Ophiolite Valued Senior Member

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    Finally! Someone else who actually understands the function and value of the Drake equation.
     
  16. QUESTION THE ANSWER Registered Member

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    To my understanding all the matter in the Universe was at one point in space, at one time. If redshift shows that the Universe is ever expanding will it come to a point where expansion stops and all is slapped back to a single mass? and if so, would it be possible to escape the gravity of this mass? or is it capable to all together travel so far from this that this mass loosens its grip just enough that whatever has traveled away from it can watch the "universe" give birth again?
     
  17. origin Heading towards oblivion Valued Senior Member

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    Nope. It looks like the universe will continue to expand until it a cold dark place.

    No. It is not that matter would collapse to a point it is that the universe would collapse to a point. You and EVERYTHING, space included would be at that point.
     
  18. KilljoyKlown Whatever Valued Senior Member

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    Yes that is the current speculation, based on the current understanding of light and red shifting over very long distances.

    Since you are wrapping up space into that point. What do you call where that point is? Maybe subspace is as good as any other name?

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  19. wellwisher Banned Banned

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    As far as intelligent life in the universe, beyond the earth, although this is very reasonable, there is no tangible proof. There is as much tangible proof there is intelligent life in the universe as we have tangible proof for flying unicorns.

    It takes faith to believe in intelligent life in the universe, in the light of no tangible proof. All we have is reasonable inferences. If we apply the scienfic method, the lack of proof means intelligent life does not exist for today. But anyone with an intutiitve intellect, will realize that the scientific method is limited by its own bias, since reality often takes time to find the proof.
     
  20. KilljoyKlown Whatever Valued Senior Member

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    Nobody is saying there is any other intelligent life in the universe, and there are a few that don't even think humans have earned the right to be called intelligent. But we are intelligent enough to have a technological society. The fact that we exist at all is proof that nature can produce intelligent beings. So it is reasonable to believe in all the vast universe we are probably not the only ones. It doesn't take any faith at all to acknowledge the probabilities.

    We exist and what happens in nature once tends to happen many times. Finding the proof is only a matter of time. It's to bad you can't say that about God, isn't it?
     
  21. Dywyddyr Penguinaciously duckalicious. Valued Senior Member

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    Contradicting yourself here. Faith or reasonable inference?

    Absence of evidence is not evidence of absence.

    In other words: "I'm a woo woo so I'm allowed to disagree with science".
     
    Last edited: Sep 27, 2011
  22. origin Heading towards oblivion Valued Senior Member

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    It would still be the universe, it would just be really, really little.

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  23. KilljoyKlown Whatever Valued Senior Member

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    Okay, but no matter how big or small the universe is. It has to be somewhere and I want to know what that somewhere is called?

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