The popular belif is that life can only exist in the same way that it has on our planet.
Many sientists agree that any alien life would have to be Carbon based. Also it is common place to believe that water is also neccisary for life to take place, as it is an important catalyst of biochemical reaction to take place.
It is also believed that an alien planet must be within the habitable zone or "The Goldie locks zone" wher ethe temparature from their star is not to hot and not to cold its just right. For each star this area would be at a diffrent distance.
[img]http://en.wikipedia.org/wiki/File:Habitable_zone-en.svg[/img]
Also many sientists believe in order to harbor life, a system must be close enough to the galactic center that a sufficiently high level of heavy elements exist to favor the formation of rocky, or terrestrial, planets, which are needed to support life. Heavier elements also need to be present, as they are the basis of the complex molecules of life. Heavier elements in general become increasingly necessary for complex life on Earth.On the other hand, the planetary system must be far enough from the galactic center that it would not be affected by dangerous high-frequency radiation, which would cause damage and harmful alterations to the DNA of any carbon-based life.
[img]http://physics.uoregon.edu/~jimbrau/BrauImNew/Chap28/FG28_11.jpg[/img]
now Stephen Hawkings is a very inteligant man, some say he is the smartest man in the world his dibilitaing disease disabled alomost all of his body he cant move or talk but he can think... and he does alot of that but this isnt about his life but rather his theories.
Hawking presented three options.
1) being that there is no life out there
2)somewhat pessimistically, but subsequently, that when intelligent life gets smart enough to send signals in to space, it is also making nuclear bombs.
3)prefers option number three. "Primitive life is very common and intelligent life is fairly rare," he quickly added: "Some would say it has yet to occur on earth."
Some prominent astrobiologists have warned that we humans may be blinded by our familiarity with carbon and Earth-like conditions. what we're looking for may not be in our "Habitable zone". After all, even here on Earth, one species “sweet spot” is another’s species worst nightmare. it is not beyond the realm of reality to believe that out first alien incounter may not be with a carbon based life form.
Alternative biochemists believ there are several elements and compounds capible of spawning life. Because carbon has worked for the conditions on Earth, we speculate that the same must be true throughout the universe. In reality, there are many elements that could potentially do the trick. Even counter-intuitive elements such as arsenic may be capable of supporting life under the right conditions. Even on Earth some marine algae incorporate arsenic into complex organic molecules such as arsenosugars and arsenobetaines. Several other small life forms use arsenic to generate energy and facilitate growth. Chlorine and sulfur are also possible elemental replacements for carbon. Sulfur is capably of forming long-chain molecules like carbon. Some terrestrial bacteria have already been discovered to survive on sulfur rather than oxygen, by reducing sulfur to hydrogen sulfide.
Nitrogen and phosphorus could also potentially form biochemical molecules. Phosphorus is similar to carbon in that it can form long chain molecules on its own, which would conceivably allow for formation of complex macromolecules. When combined with nitrogen, it can create quite a wide range of molecules, including rings.
So what about water? Isn’t at least water essential to life? Not necessarily. Ammonia, for example, has many of the same properties as water. An ammonia or ammonia-water mixture stays liquid at much colder temperatures than plain water. Such biochemistries may exist outside the conventional water-based "habitability zone". One example of such a location would be right here in our own solar system on Saturn's largest moon Titan.
Hydrogen fluoride methanol, hydrogen sulfide, hydrogen chloride, and formamide have all been suggested as suitable solvents that could theoretically support alternative biochemistry. All of these “water replacements” have pros and cons when considered in our terrestrial environment. What needs to be considered is that with a radically different environment, comes radically different reactions. Water and carbon might be the very last things capable of supporting life in some extreme planetary conditions.
so begs the question, who is right? what do you think? Also are you excited that we now have a much larger area for where lif can exsist.
for som short clips for "Stephen Hawking's Universe: aliens" go here [url]http://dsc.discovery.com/videos/stephen-hawking-aliens/[/url]
Probably the wrong community to post intelligent threads in. Try making a thread about how your anus caught on fire or something.
[highlight](User was banned for this post ("Thread shitting" - Hezzy))[/highlight]
I'd still like to believe that it's out here somewhere :frown:
[editline]11:17PM[/editline]
[QUOTE=franz;21513323]Probably the wrong community to post intelligent threads in. Try making a thread about how your anus caught on fire or something.[/QUOTE]
What the fuck are you on? Intelligent threads pop up all the time. Stop trying to be funny.
....Well this is a good theory. Personally and logically if you look at the odds they favor some life besides us. I mean there are what 200 billion stars in our galaxy alone? Wouldn't it be a 1 in a trillion chance that we were the only form of life? i know that micro-organisms are considered life but it's not the type of life that we are able to communicate with, so to be the only form like us would be sad.
What the fuck are you on? Intelligent threads pop up all the time. Stop trying to be funny.[/QUOTE]
thanks
I love Stephen Hawking. The man's a genius.
Didn't he also say it was a terrible idea to broadcast our location to the Galaxy?
[QUOTE=Kylel999;21513335]
What the fuck are you on? Intelligent threads pop up all the time. Stop trying to be funny.[/QUOTE]
Of course they do, but they're rated dumb and get trolled.
There definitely has to be life out there, but I agree with hawkings that they would also be looking to destroy themselves with atomic weaponry.
I've always thought this. Why should other lifeforms require water and carbon?
steven hawkings is such a cock.
"WHAT?! YOU BELIEVE SOMETHING THAT DOESN'T SOUND PLAUSIBLE?!?!?!? FUCK YOU"
Too bad Stephen Hawking can't talk like a normal human being.
He must have a lot of time to make up these theories while not getting laid.
It's a possibility that there are other forms of life that we can't percieve. Human senses don't percieve all of reality.
[QUOTE=TacoFamine;21513652]Too bad Stephen Hawking can't talk like a normal human being.
He must have a lot of time to make up these theories while not getting laid.[/QUOTE]
See?
[QUOTE=franz;21513680]It's a possibility that there are other forms of life that we can't percieve. Human senses don't percieve all of reality.
See?[/QUOTE]
yea that guy really can percieve all of reality
[QUOTE=snikpohdlawso;21513471]
thanks[/QUOTE]
Cody, you're spelling, grammer, and avatar sucks, but be proud, you've made a good first thread.
well, second actually.
anyways, im gonna go do my history paper for tomorow
Michio Kaku said something one time.
He said that there's a chance that we could be directly in the middle of an intergalactic conversation between two aliens, but they're using the 5th-10th dimensions to do it, so we can't hear it.
Imagine two short wave radios having a conversation, but the people in the middle can't hear it because they're not on the same frequency.
The aliens COULD be talking directly to us, trying to get out attention, but we just can't hear them.
[QUOTE=franz;21513323]Probably the wrong community to post intelligent threads in. Try making a thread about how your anus caught on fire or something.[/QUOTE]
[quote]3)prefers option number three. "Primitive life is very common and intelligent life is fairly rare," he quickly added: "Some would say it has yet to occur on earth." [/quote]
Your name is Cody?
Hi Cody!
[QUOTE=snikpohdlawso;21513725]yea that guy really can percieve all of reality[/QUOTE]
Nah, it's just that when all you do everyday is think, you can become much more intelligent than the average human.
[QUOTE=Juniez;21513827]Your name is Cody?
Hi Cody![/QUOTE]
hi
Three words in and your thread gets shit on by grammar Nazi's.
[B]Edit[/b] Interesting read though, I like Stephen Hawkings, he's a badass.
[QUOTE=Canuhearme?;21513497]Didn't he also say it was a terrible idea to broadcast our location to the Galaxy?[/QUOTE]
Yes he did. Why? Because if you look at our history, more primitive cultures tend to be enslaved or otherwise exploited.
Hawking is from mars.
[QUOTE=ASmellyOgre;21514383]Yes he did. Why? Because if you look at our history, more primitive cultures tend to be enslaved or otherwise exploited.[/QUOTE]
Why do we always assume that we're primitive? what if the aliens are like, 90% like us?
[IMG]http://chud.com/articles/content_images/5/xenomorph.jpg[/IMG]
A Silicone-based life form.
As much as I hope Aliens are discovered within my lifetime, there's a 0% chance that will even happen... and I'll die before any discovery is made.
[QUOTE=Dr. Fishtastic;21517115][IMG]http://chud.com/articles/content_images/5/xenomorph.jpg[/IMG]
A Silicone-based life form.[/QUOTE]
Something exactly like that probably exists.
we definitely aren't the only intelligent beings
[editline]03:23AM[/editline]
and there's definitely life in our galaxy besides us, might even be intelligent
[quote=tau!;21517157]as much as i hope aliens are discovered within my lifetime, there's a 0% chance that will even happen... And i'll die before any discovery is made.
Something exactly like that probably exists.[/quote]
we are all going to die
[editline]08:31PM[/editline]
@Xenomorph realization part of post
I bet he hopes some aliens out there can make him and his dick work again.
Anyone else gonna watch the Stephen Hawking special on discovery channel?
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