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View Diary: 8.8 billion Earth-like planets (70 comments)

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  •  Where is everybody? (4+ / 0-)
    Recommended by:
    julesrules39, cotterperson, mayim, VickiL

    Well, with over 8 billion other planets to choose from there are plenty of planets the Kewl Kids to hang out on.
    I'm afraid we're too young and dumb and full of...

    -4.38, -7.64 Voyager 1: proof that what goes up never comes down.

    by pat bunny on Mon Nov 04, 2013 at 05:18:03 PM PST

    •  Here's a good site on the Fermi Paradox (7+ / 0-)



      Is it true? Is it kind? Is it necessary? . . . and respect the dignity of every human being.

      by Wee Mama on Mon Nov 04, 2013 at 05:42:21 PM PST

      [ Parent ]

      •  Thank you for that link (2+ / 0-)
        Recommended by:
        Wee Mama, cotterperson

        I've incorporated it into the diary.

      •  Thanks, Wee Mama. (2+ / 0-)
        Recommended by:
        Wee Mama, mayim

        A snip from your fine link:

         

        The Fermi paradox is the apparent contradiction between high estimates of the probability of the existence of extraterrestrial civilizations and the lack of evidence for, or contact with, such civilizations.
        These planets have conditions suitable for water, and we're watery people on a watery planet. IOW, we're looking for life like our own. However, just because the conditions exist doesn't mean the planets have water or watery inhabitants, nor does it mean they are "like us."

        Just re-watched an old mini-series of Ray Bradbury's Martian Chronicles on archive.org. Most thought provoking, because the Martians had evolved into energy and took the form of matter when they needed to.

        Fascinating stuff. I just hope we're not too parochial ;)

        "Let each unique song be sung and the spell of differentiation be broken" - Winter Rabbit

        by cotterperson on Mon Nov 04, 2013 at 09:12:49 PM PST

        [ Parent ]

        •  We're looking for liquid water, yes. (2+ / 0-)
          Recommended by:
          Wee Mama, cotterperson

          because that's what makes our kind of biochemistry possible.

          Basically, life is swarms of nanomachines -- proteins, ribozymes, DNA, RNA -- and carbohydrates, which are more repetitive molecules. Our nanomachines depend on water to work.

          Conceivably, you could have life based on nanomachines in some liquid other than water, but it would be chemically very different from Earth life, and we wouldn't know what to look for. (But when the Huygens lander splashed down on Titan, everybody who looked at those pictures was probably hoping to see some improbably shaped object.)

          It is hard to imagine naturally evolved life based on nanomachines that don't require a liquid of any kind. Electronic devices are like that, but could complex electronic life they evolve without us more motile forms assisting them?

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