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Where did all the water come from? Space!

Discussion in 'Science & Technology' started by twilyth, Oct 12, 2011.

  1. twilyth Guest

    That's right. What started out as a bizarre sounding theory continues to gather more proof in its favor.

    http://www.time.com/time/health/article/0,8599,2096512,00.html

    more at the link
     
    10 Year Member at TPU
  2. Drone

    Drone

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    Water seems to be a simple substance but it always had some mystery behind it. I don't know about water-carrying comets. Always thought that water have been generated on Earth. On other planets iced water is a common thing but Earth had optimum conditions for liquid water. But yes who knows when and how exactly did water appear on Earth and it's hard to imagine a life form that doesn't need water at all.
     
  3. EiSFX

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    this is kinda off topic but also on topic at the same time all scientists out there have it drilled in to there head that all living things need oxygen and water to live as that maybe true for all the living things on Earth but how do they know that all living things need that to live yes it maybe true that living things to need that to live but it may not be as well maybe there is alien life forms out there somewhere on a certain planet that maybe thoes two thing hurt them or can live with out these things maybe they live off the exact opposite of what all these people claim of life sustaining planet
    unless they have a sample from every single planet and every single possable life for from all thoes planets in the entire universe they can't say for a fact that this or that planet can hold life who really knows maybe theres life on a planet with no atmosphere and can live in the vacume of space i just find it funny that they jump to the conclusion that every single living thing as they consider in the universe needs oxygen and water to live
     
  4. Inceptor

    Inceptor

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    Is oxygen absolutely needed for life?
    Probably not. Anaerobic bacteria for example.

    Water? Maybe not.

    The thing that makes studying oxygen and water based life so interesting and important is that it's what we are. Chemically, it works, so it will work elsewhere in the universe within the necessary astrophysical parameters. Also, water is very abundant in the universe, so it's a very good idea to take that line of study, since, statistically, if we ever detect or discover life somewhere 'out there' (intelligent or otherwise), it's likely that its biology will be based upon the same or similar chemical mechanism as ours (i.e. water based, and 'breathing' some form of oxygen based gas as a catalyst for energy conversion).
     
  5. Drone

    Drone

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    Plants and animals are no bacteria. Oxy is the main <fuel> for their engine.
     
  6. twilyth Guest

    hydrothermal vents have what you might call an ecosystem and that's fueled mainly by hydrogen sulfide I think. There's probably some oxygen even in that environment, but I think all of the life forms like tube worms and such get by mainly on the sulfur.

    Also, earth didn't have oxygen in it's atmosphere until a billion or so years ago. But there was life before that.
     
    10 Year Member at TPU
  7. laszlo

    laszlo

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    or the alien stopped here and use earth as toilet...pissed 2 much
     
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  8. Drone

    Drone

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    How do you know that they pissed water?
     
  9. Loosenut

    Loosenut

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    Because you can make perfectly good drinking water from piss
     

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