View Poll Results: Does extraterrestrial life exist?

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  • I believe it does

    86 65.65%
  • I don't believe it does

    15 11.45%
  • I am undecided/other

    30 22.90%
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Thread: Intelligent Extraterrestrial Life?

  1. #71
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    How Probable is It That Life Exists Elsewhere in the Universe?

    I wonder what the other people on Skadi think of this. I figure we'd have to be incredibly lucky to be the only planet, in a tiny solar system, in a corner of a galaxy out of billions, to be the only place where life thrives.

    I find this quote interesting too:
    'Hydrogen is a light, odorless gas, which, given enough time, turns into people. ' - Edward Robert Harrison

  2. #72
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    I'm uncertain on how to answer this question. Yes and no is probably the best answer that I can give. I run the BOINC software from SETI on my desktop, which helps the group sort through signals, so I'm not a non-believer in the idea of non-human life "somewhere out there." I've also read some credible publications on the matter, usually by SETI-affiliated scholars, so it's an avid interest of mind. But, thus far, I've seen little to convince me that it's true.

  3. #73
    Senior Member SaxonCeorl's Avatar
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    I think the question is whether the development of life here on Earth was just a fluke or if life will automatically be created given the right conditions. If it's the latter, than surely there must be planets out there that have similar enough conditions to Earth, even if only a handful.

    I wonder whether the type of progression seen here on Earth (single-cell -> multi-cell -> water animals -> land animals, four legs, two eyes, plants, etc.) would automatically happen elsewhere given the same conditions.

  4. #74
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    Quote Originally Posted by SaxonCeorl View Post
    I think the question is whether the development of life here on Earth was just a fluke or if life will automatically be created given the right conditions. If it's the latter, than surely there must be planets out there that have similar enough conditions to Earth, even if only a handful.
    Assuming that the earth is not unique in the universe then the conditions that existed on the early earth must exist elsewhere in the universe. Then it is a question of how difficult it is for life to emerge given the right conditions. Well on earth we know from the fossil record that the very oldest rocks we have have evidence of microbes. Therefore if life originated on earth it didn't take very long in geologic terms for it to do so (perhaps a couple of hundred million years).

    However, multi-celled life may be a different matter. It took single-celled life only about a hundred million years to appear after the earth cooled, but it wasn't for another 3 billion years until anything that we would recognise as "creatures" emerged. It may be that life only has another billion or so years left on the earth before to sun becomes too hot to support life here. In that case during lifes 5 billion year span on the earth, multi-cellular life will only have had a 1.5 billion year window in which to exist and give rise to intelligence. Given that it took multi-celled life 3 billion years to come about in the first place 5 billion years might not be very much time for the emergence of intelligence on a terrestrial planet.

    I wonder whether the type of progression seen here on Earth (single-cell -> multi-cell -> water animals -> land animals, four legs, two eyes, plants, etc.) would automatically happen elsewhere given the same conditions.
    It is a question of probabilities. Given that it could, it is only a question of whether it would. Given enough chances on enough planets throughout the universe I think it is likely that life eventually would develop.
    Close observation may result in feelings of horror, wonder and awe at world you find yourself inhabiting.

  5. #75
    Senior Member RoyBatty's Avatar
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    If something "out there" lives and we happen to find it.... kill it quick. o/

    (Assuming it isn't developed enough to kill us first)
    ~ **** Democracy! It's 2 wolves and 1 sheep deciding what's for dinner.

  6. #76
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    The New Scientist ran an article which suggested that due to the energetic cost of increasing cell size and complexity to a degree that enables functional multicellular life (I have forgotten how they got from size to the possibility of multicellular but they explained it) it is impossible without the symbiotic relationship of cell to mitochondria and also that unlike life, which looks energetically to be a likely process, the acquisition of mitochondria may be a complete fluke and thus while single cellular life is likely to be abundant in the universe, complex life may well be unique.

    I don't know if I believe that or not, but it makes me wonder.
    Denn das Schöne ist nichts
 als des Schrecklichen Anfang, den wir noch grade ertragen,
 und wir bewundern es so, weil es gelassen verschmäht, uns zu zerstören.

  7. #77
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    Quote Originally Posted by SaxonCeorl View Post
    I think the question is whether the development of life here on Earth was just a fluke or if life will automatically be created given the right conditions. If it's the latter, than surely there must be planets out there that have similar enough conditions to Earth, even if only a handful.
    Life is, at its most basic, just a self-replicating chemical system, and once such a system has begun to replicate I think that it will go on from there. Information cannot be transmitted perfectly every time, and that will by necessity bring evolution in play. If that then will land in intelligent life or anything that we would recognize is another question.

    I wonder whether the type of progression seen here on Earth (single-cell -> multi-cell -> water animals -> land animals, four legs, two eyes, plants, etc.) would automatically happen elsewhere given the same conditions.
    Probably. Life would most certainly start in a liquid phase, all the good stuff in solution, and first develop into single-cell organisms, and only much later begin to colonize land.

  8. #78
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    Quote Originally Posted by RoyBatty View Post
    If something "out there" lives and we happen to find it.... kill it quick. o/
    Well, maybe it´s already too late. Here are some uncensored photos taken by Curiosity:






    "Judge of your natural character by what you do in your dreams" - Ralph Waldo Emerson

  9. #79
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    Are Aliens Calling to Us? Two Scientists Think So

    Two Canadian scientists report seeing messages from space and have deduced that these signals are likely coming from alien life forms.

    The two scientists from the University of Laval in Quebec, Canada, E.F. Borra and E. Trottier, report:

    “We find that the detected signals have exactly the shape of an [extraterrestrial intelligence] signal predicted in the previous publication and are therefore in agreement with this hypothesis. The fact that they are only found in a very small fraction of stars within a narrow spectral range centered near the spectral type of the sun is also in agreement with the ETI hypothesis.”

    So what is makes these two scientists believe aliens are calling to us humans?

    According to the pair, they have seen what they describe as “strange modulations” from stars. These “strange” and “very specific” modulations come from 234 out of 2.5 million stars, which the pair believe are aliens attempting to alert humans of their existence.

    The pair’s research has been published under the title “Discovery of peculiar periodic spectral modulations in a small fraction of solar type stars” in the academic journal Publications of the Astronomical Society of the Pacific.

    Although these claims are incredibly exciting, the pair and their team do acknowledge that there is still a lot of work to be done before it can be confirmed or denied that these signals really are the work of extra-terrestrials.

    For example, the team will need to go back and look at these modulations on a variety of equipment before deciding that these signals are not just flukes of the original equipment they used. If that is the case, the whole hypothesis may be, indeed, discarded.

    The team said in a statement about the findings and whether or not they were without a shadow of doubt coming from alien life forms:

    “It is too early to unequivocally attribute these purported signals to the activities of extraterrestrial civilizations. Internationally agreed-upon protocols for searches for evidence of advanced life beyond Earth (SETI) require candidates to be confirmed by independent groups using their own telescopes, and for all natural explanations to be exhausted before invoking extraterrestrial agents as an explanation.

    “Careful work must be undertaken to determine false positive rates, to rule out natural and instrumental explanations, and most importantly, to confirm detections using two or more independent telescopes.”
    https://redice.tv/news/are-aliens-ca...tists-think-so

  10. #80
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    I think it would be illogical if God has created only to this planet life. God is everywhere in the Universe, hence God surely has created in other places too life. That is another thing that this creatures have what kind of level of technology. It seems that the distances are too large to any technological developed creatures that they can arrive here or simply we are the most developed creatures in the Universe.

    However that is possible that one day we will have a great surprise in the sky.


    "Remember that, even when those who move you be kings or men of power, your soul is in your keeping alone. When you stand before God, you cannot say, "But I was told by others to do thus,"or that virtue "was not convenient at the time." This will not suffice."
    /King Baldwin IV in the Kingdom of Heaven/

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