Some things are more rare than others. Life formed here because the correct elements and environment are present. We haven't looked at other planets in other solar systems to see if life forms in planets that have similar conditions to ours.
All we know is that out of the nine planets we have looked at, it seems that life has formed on one. We don't know if life forms on 1 of a million planets or 1 of a trillion planets. But there many more magnatudes of orders more planets than that out there, so it is likely that somewhere else, there's life, too. In any case, a sample of nine is probably way too small to find two planets with life, given this one we evolved from.
(More or less planets depending on your views of pluto and other orbital bodies out there)
2007-07-26 03:22:22
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answer #1
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answered by nondescript 7
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We are just the right distance from the sun. We are close enough to stay warm, but far enough away that we dont burn up. They have found out that life once existed in underground caves on Mars when meaning life I mean water and some microrganisms. Mars is the next planet beside Earth and is a little father from the Sun than Earth. Personally I dont think we are alone Space is too big for earth to be the only living thing it the universe.
2007-07-26 10:37:50
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answer #2
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answered by Anonymous
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Wow. *sigh* Loaded Question.... where to begin. Gonna make it a points answer. Main answer: The conditions weren't correct for organic life (as we know it) to flourish....
~Some planets don't have oxygen on the surface.
~ The planets' atmosphere therefore have different gases that can be fatal to organic life (as we know it)
~ The distance from each of the planets creates either too hot or too cold of an atmosphere.
~ The size of the planet will give the surface either too much gravity (Jupiter or Saturn) that would require massive density of bones to live on or an exoskeleton or too little gravity (Mercury, Pluto) that any amount of mass has trouble staying on the surface.
~ With the gravity argument also, there is the fact that noxious gases are usually forming the atmosphere, keeping out light, and keeping in heat. Thus the surface would be dim, but volcanic.
Also... it is hypothesized that one of the moons of Jupiter might have life on it, in an oceanic type of way, under it's ice surface. Mars shows signs of having life millions of years ago and scientists are attempting to figure out what went wrong.
There are probably many more arguments as to what, why and how. But those are the ones that stand out to me.
2007-07-26 10:32:19
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answer #3
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answered by Anonymous
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There are a few conditions that are necessary for any form of life to be able to develop on a planet. Those conditions are not present on other planets at this time (to our knowledge).
Basically, the earth did have to be somewhat hospitable to life before life could start. Once it started, it adapted to the existing conditions.
And, BTW, we don't know that there wasn't ever life on other planets. There might be life on them right now that we just can't see.
2007-07-26 10:33:08
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answer #4
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answered by Anonymous
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Well firstly the Gas giants (Jupiter, Saturn, Uranus and Neptune) are well - gas . So they don't have a solid surface - therefore no life
Secondly there's something around all stars called the "goldilocks zone", it is a small zone where life could exist, no other planet in our solar system except Earth is in the goldilocks zone and therefore Earth is the only planet capable of supporting life.
2007-07-26 10:26:07
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answer #5
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answered by Anonymous
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First – evolution is only about biology, so the initial premise of your question is wrong.
In any case, the physical and geological evolution of the other planets has indeed occurred and is well documented.
Also, it is not the case that biological scientists (‘evolutionists’ to use the term invented by the Christian-right) hang out in the R&S section. It is that Creationists wisely avoid the Science & Mathematics section and the ************ they always get whenever they try and claim scientific merit for their mythological beliefs.
2007-07-26 10:29:51
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answer #6
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answered by Anonymous
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Their conditions are extremely close to being able to support life, but still slightly unable. I mean, if we didn't have the moon as it exists today, we wouldn't have life at all. That's how incredibly balanced our ecosystem is.
And I see the point a lot of religious people make, that it would be extremely hard for this all to happen by chance. But if you stick a bunch of monkeys in a room with typewriters, they'll eventually produce Shakespeare.
2007-07-26 10:25:20
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answer #7
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answered by Anonymous
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Wow. You must have an USA education, because in the rest of the world, kids learn this stuff in grade 2. Venus is to hot, Merkur is even hotter, Mars is to small, to carry an atmosphere, Saturn is made out of gas and so on. Earth had the right distance and size and materials. Volcanoes spit out enough steam, to create water, the top condition for carbon based live to appear in form of a very primitive nucleus.
2007-07-26 10:30:09
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answer #8
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answered by Anonymous
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The fact is that conditions are right on one planet for a species capable of asking, "Why are we here?" We know of a few hundred planets in other solar systems and have explored none. Many of these questions are akin to asking, "Why is it now?"
2007-07-26 10:27:29
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answer #9
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answered by novangelis 7
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I will answer by medifore . . .
Does every act of sex lead to pregnancy?
Does every seed that is planted grow?
Does ever question asked get answered?
All of these have the potential. It just happens that only one out of the 8 planets in this solar system is capable of sustaining life.
2007-07-26 10:25:48
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answer #10
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answered by Anonymous
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