I'm pretty sure another has already been found which can support life, so I don't think we're alone~
[QUOTE=Jookia;33277645]So why doesn't everything exist and nothing not?
[editline]15th November 2011[/editline]
We lack any evidence of life on other planets, yet have tons of evidence that there's life on this one.[/QUOTE]
You realize how many planets there are, right?
We have studied barely any planets in comparison to how many there really are.
[QUOTE=Jetblack357;33294433]You realize how many planets there are, right?
We have studied barely any planets in comparison to how many there really are.[/QUOTE]
Yep. That doesn't mean we have proof life exists out there.
[editline]16th November 2011[/editline]
[QUOTE=imasillypiggy;33291859]There is a difference. Unless there is some reason that we know of that makes life special there is no reason to not believe there is more then one. The chances of there being one planet is far less then there being more then one. We don't know exactly what the chances are but we can safely say its probably not the percentage which causes only one intense. If we didn't know exactly what caused a black hole its pretty safe to assume that once you find one there are going to be others.[/QUOTE]
So you think there's multiple universes too without evidence?
[QUOTE=Jookia;33295221]So you think there's multiple universes too without evidence?[/QUOTE] There kind of is evidence. There are theories based around it. Even though I don't see what the point of that post was because statistical probability is evidence.
[QUOTE=Noble;33278815]So are you telling me you're going to try to prove a negative by offering me hard evidence against the existence of extra terrestrial life? Please point out to me how other planets having evidence of liquid water on the surface and evidence of conditions suitable to life is not a good enough reason to believe life may exist there?[/QUOTE]
Since we have know idea how life actually began on Earth we cannot say whether any planet deemed "habitable" will at any point contain complex life. Therefore the existence of alien planets deemed "habitable" cannot be used as evidence of complex alien life.
The only true evidence of complex alien life will be actual signs of complex alien life existing or having existed. There is none at the moment.
[QUOTE=flyschy;33296760]Since we have know idea how life actually began on Earth[/QUOTE] Yea we do. Well at least we have a good idea and hypothesis. Its that the chemicals of early earth were able to make the building blocks of life.
Yes.
[QUOTE=imasillypiggy;33297012]Yea we do. Well at least we have a good idea and hypothesis. Its that the chemicals of early earth were able to make the building blocks of life.[/QUOTE]
We are a long way off being able to describe the exact conditions and processes that lead to the formation of life (and complex life) on Earth. Without this knowledge we cannot say with certainty if alien planets which are deemed "habitable" have at some point formed life.
There's so many planets in our universe that the chances of not a single other planet supporting even the simplest forms of life is really, really really unlikely, to the point that it's almost impossible.
The numbers involved make my head hurt.
However there isn't any hard empirical evidence yet to show life on other planets. Apparently there's been presence of microorganisms in our upper atmosphere, but that's all I've seen so far. I personally do believe there's some kind of life somewhere else in the galaxy, but I don't have any hard EMPRICIAL evidence to back it up.
Sorry, but if you ask me the scientific method cannot use theories and probability as evidence.
There's no evidence, so no one can argue this with proof. However statistically it would seem very unlikely that we are the only planet with life.
[QUOTE=RearAdmiral;33297196]There's so many planets in our universe that the chances of not a single other planet supporting even the simplest forms of life is really, really really unlikely, to the point that it's almost impossible.
The numbers involved make my head hurt.[/QUOTE]
[U]What numbers?[/U] The size of the universe is not alone an argument!
Look, think of it like this:
You have 100 boxes. Inside each box there can either be a green ball (life) or a red ball.
You have opened one box so far, and there was a green ball in it.
How can you from only this information estimate the remaining number of green balls? The answer is you can't!
But can't you at least make a qualified guess and say that there is more than one green ball out of all the 100 boxes? No, you can't. You don't know the green/red ball ratio. You don't know how likely you are to find any color. If the ratio happen to be 1:100 or less then you would [I]not[/I] be more likely to find any green balls. And the other way around. And even if you add like a trillion more boxes with the same conditions then it's still impossible to know, since the ratio can move equally many steps in [I]each[/I] direction.
Don't say it's more likely or not unless you show your calculations for those chances.
Of course I understand what you mean. I too believe there is much life out there. But I [B]believe[/B] that. I don't present it as science and force it upon anyone by using made up probabilities and statistics that don't exist.
PS. Sorry if I'm coming off harsh. I just feel like I've explained this a million times without any success.
[QUOTE=DarkSiper;33278950]We have already found proof of life outside our planet(Mars for example)[/QUOTE]
Uh, no, we haven't.
[QUOTE=Jookia;33285233][b]We don't know what the chances of life are. All we know is that we're the only confirmed planet with life on it and [I]there's no others with life on it[/I]. That's the answer to the debate.[/b][/QUOTE]
This is not the answer because we [B]DONT KNOW[/B] if there are others with life on them.
Also:
[QUOTE=Jookia;33285233]Yep. That doesn't mean we have proof life exists out there.
...
So you think there's multiple universes too without evidence? [/QUOTE]
1. It doesn't mean that we have proof that life doesn't exist either.
2. You think that there aren't multiple universes? Where's your evidence. Plus, would you say that to some of the world's leading physicists who have extensive theories on the multiverse?
[QUOTE=Triarii;33298086]
2. You think that there aren't multiple universes? Where's your evidence.[/QUOTE]
You don't believe in unicorns? Where's your evidence?
hell no.
sure it hasnt been proven, but its possible theres another planet that is thinking they are the only planet with life.
and in terms of contact, they might not use the same methods/systems/frquencies/whatever than us.
Mathematically, its is impossible for there not to be, in the 100 Billion Galaxies, which most have 10 Billion Stars, and maybe of those stars, 50% have planets.
This is such a silly question honestly, it's pretty damn obvious there's life out there, with the size of universe and all that.
When life was brought to Earth, who says that the asteroid only hit Earth on it's way here. It could've been split down the line and spread across many different planets. Habitable or not.
[QUOTE=DeandreT;33299401]Habitable or not.[/QUOTE]
to humans anyway.
i would assume whatever lifeforms exist in planets with different climates/atmospheres/whatever would've adapted/evolved to fit in from the beginning.
Hehe... It's like lighting a match in a forest and watching it spread. XD I love this thread.
[QUOTE=comet1337;33299551]to humans anyway.
i would assume whatever lifeforms exist in planets with different climates/atmospheres/whatever would've adapted/evolved to fit in from the beginning.[/QUOTE]
Maybe so, but even then no life form has adapted to live in, say lava? Or in space, flying around like a space bird?
So surely there are limitations, and too extreme conditions. But even then, there are animals living in very extreme conditions as is, right on our planet. Like in the bottom of the sea, etc.
To title, definitely not.
[QUOTE=RixxzIV;33299086]You don't believe in unicorns? Where's your evidence?[/QUOTE]
True, I see where you are going but there is a difference between fiction and a theory. The unicorn was made up by people and is obviously not real (i.e.fictional) but a theory is an idea that is yet to be proven.
Im sure there is some life out there. But i'm also quite sure it's nowhere near us and we're never gonna get a contact.
Mars has bacteria on it, that's considered alien life.
[QUOTE=Talking Jarate;33312312]Mars has bacteria on it, that's considered alien life.[/QUOTE]
Nobody's sure about life on Mars right now. It could have basic life, but it's not going to be easy to find. It looks like a good place for terraforming, though.
Titan (Saturn's largest moon) is the #1 candidate for a possible host for life in our solar system. The fact that it's smaller and farther away than mars makes it a tricky place to explore, though.
[QUOTE=Triarii;33311720]True, I see where you are going but there is a difference between fiction and a theory. The unicorn was made up by people and is obviously not real (i.e.fictional) but a theory is an idea that is yet to be proven.[/QUOTE]
A scientific theory is an idea that has been proven (with the scientific method). There is absolutely nothing higher than a theory in science. A scientific theory is as much of a proven fact as you can get.
[QUOTE=Noble;33313947]A scientific theory is an idea that has been proven (with the scientific method). There is absolutely nothing higher than a theory in science. A scientific theory is as much of a proven fact as you can get.[/QUOTE]
Ok I was thinking along the lines of a hypothesis. The multiverse is a theory though, not a hypothesis.
Oh well, the point of my argument doesn't change.
[QUOTE=ToxicX;33300515]Hehe... It's like lighting a match in a forest and watching it spread. XD I love this thread.[/QUOTE]
You're in the debate section. Welcome.
Space has more stars than we have people, I find it hard to believe not a single solar system could have life on them.
We will most likely not meet any in our lifetime, but to say there isn't is just silly.
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