How much of life is based on theory?
363851
Life could be a theory too...how do you prove that you exist? Try reading Descartes' Meditation...
908441
Minor theories are challenged and disproved every day. Major theories tend to last longer (that's what makes them major theories).
1031491
Natural Life is until you die, an Life is 20yrs
280906
Supposedly the universe is estimated to be about 13.6 billion years old.  I think I read that on Wikipedia, though, so you never know...\n\nThat said, I really have so little idea what is out there or what conditions are necessary for life to arise that I don't know which theory is more plausible.  How flexible are the conditions that lead to the formation of primative cells on Earth?  Can there be life based on an entirely different set of molecules?  An entirely different set of elements (i.e. not carbon based)?  How many other planets have chemical compositions and climates like Earth?  Did life even originate on Earth? (I've heard the theory that primative cells could have originated on another planet and been brought here on an asteroid).  Could primative cells have left Earth on some sort of asteroid and taken up residence elsewhere?\n\nI'd like to think there's other life out there, just because it makes things more interesting.  Until I have reason to believe otherwise, I'll assume there is.
406389
It is well-established that the human brain has the capacity to take in an infinite amount of knowledge and information, far more than our 80 years of life allows.  It is also well-established that the human body is constantly repairing, renewing and replacing itself, and should go on doing so.  The human body, by design, should live forever and should be forever young. The  medical field cannot understand why it is not so. These two facts alone demonstrate that this life, logically, is not all there is.
1137064
I'd say 50/50, just guessing. For just 'life' with no intelligence, such as plant, animal, or some other form, I'd say 90 percent. Intelligent life is tougher to do.
697195
theoretically that is believed to be true
1164312
Yet another interesting question, man_id.\n\nAll a theory of abiogenesis can do is give an answer for how life-from-non-life is *possible*.  ... I.e. what ingredients and conditions might result in a replication system that is sufficient for natural selection to take over?  And which ones *may* have been present in the early days of the earth (knowing what we do know about those days)?  There may, in fact, be multiple answers ... many different recipes, all equally possible.  If so, then we may never know which one actually occurred on our planet.\n\nBut it is also possible that we may never find a recipe that works that we know might have been available in the earth's infancy.  We've only started looking.
470564
Here is the mathematical formula:\n\nThe universe is endless.\n\nSo are the possibilities of having a life-form like humans elsewhere in the universe.\n\nEndless divided by endless equals to unknown
276013
There is an author. Zacariah Sitchin. Whether his views are right or not he really gets you to thinking a lot deeper. Personally, yes, I believe that this life is just a testing period to prepare us for the next life. After all, what is a lifetime here in years compared to an eternity of years.
850994
Life?  What is your definition of life?\n\nLife on Earth is based on the remarkable ability of the DNA molecule to replicate.  This have grown and evolved and so on into what we call life...\n\nI can't even begin to guess how many other molecule chains there are that replicate...  How many forms fo crystal are there?  \n\nDNA, and the component molecules are all very dependant on water, so if you mean life like us.  Something we could convert to food, or hope to relate to...  Then, no.  "Life" can not exist without water.\n\nIf you mean simple a complex self replicating construct of higher molecules...  Then , yes...  There may even be some sort of crystaline life form out there right now that's wondering is Life and exist without liquid silicone...
525655
Yes, and I can prove it mathematically:\n\nOur galaxy (the Milky Way) contains at least (by most estimates) 100 billion stars. Now thanks to the Hubble space telescope, we know for a fact that there are other solar systems out there. So let's be conservative and assume that just 1% of the stars in our galaxy have planets in orbit around them.\n\nThat's 1 billion other solar systems.\n\nNow, of those solar systems, let us assume that a further 1% have a planet that is just the right distance from the star to support life.\n\nThat's 10 million planets where life is possible.\n\nAnd if on just 1% of those planets, life actually formed, then there are 1 million planets in our galaxy that have microscopic life on them.\n\nNow let's assume that of that total, 1% have life evolve to any level of significance (creatures with a rudimentary intelligence). \n\nThat gives us 10,000 planets that actually have alien species on them.\n\nAgain, let's go with 1% and say that's the number of planets on which life developed any significant degree of intelligence and formed a civilization.\n\nThe end result is that there are at least 100 planets in our solar system that support life at least as intelligent as we are.\n\nNow, consider that our galaxy is one of an estimated 125 billion galaxies in the universe.\n\nThat gives you over 1 trillion alien civilizations scattered throughout the known universe.\n\nFrankly, it is scientifically impossible that we are the only intelligent species.\n\nAs for whether any of them have made contact with us... no, I don't believe so. You're talking about 100 planets in a galaxy of over 100 billion stars. The odds against any two of us making contact are just too great.
54602
It depends on which side of the religous debate you stand on. But in my view the universe is far to big for only one little speck of life to exist
1067842
Using mathematics to determine the chances of life elsewhere in the universe, one estimate determines that there are approximately 10^75 advanced societies.  If true, then it is very likely that there is life beyond earth – even advanced life forms.
249324
Of course the size of this galaxy and universe are beyond human undestanding, I know this scientist did a math formula where he put the very least possiblities of life and the number was still huge.\nEx, he did like in one galaxy there is only X planet where there is water and only X springs life and only X becomes civilized, and in the end he figurd there tons of life out there!
364473
Already been done.\n\nBased on current observable evidence, there is increasing perenctages of certainty regarding the timeline and history of the development of life on our planet.\n\nIt doesn't exclude G-d. It just outlines the observable and measurable properties of the phyiscal evidence.
69977
Totality can never last more than 7 min 40 s, and is usually much shorter.\n\nFollow the link for more information.\n\nhttp://en.wikipedia.org/wiki/Utopia#Utopia.27s_Family