Hi.
Honestly, I think that there might be aliens, but we may not be able to contact them. The reasons are :

1) We invented radio astronomy 50 years ago. The time is negligible when compared to the 1 million years humans have taken in evolving. And we cannot deny the fact that the evolution of an intalligent conscious species could have happened a lot earlier, possibly even 50 million years earlier. So could have the evolution of aliens. So, we cannot say that an alien species will have radio astronomy at about the same time we have.

2) We see light in the range that we call 'visible light' as we are evolved that way. Aliens may not have evolved to even see light. They may communicate by somethings we aren't even aware of (!), as our evolution has not prepared us for it. It may even be that their perception of what we call 'light', 'sound' etc. is different from us. So, we may not be able to contact them.

This is what I think. What do You all do ?

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Limericks, written by me: http://limericker.blogspot.com

This is true, but I think that a species who had technology since a million years back or so would still pretty easily put together a few big powerful radiotelescopes if they want to contact more primitive species such as ourselves. In either case, the civilizations we will find through radiotechnology will probably be more advanced than us, since they could not be much more primitive.

I agree that aliens could be extremely different from us, in how they communicate with each other, and what senses they have. However, I wonder if some sort of sight is necessary to develop technology?

I did not say that sight is necessary to develop technology.
I just wanted to say that if they develop technology, it would be very different from ours, and the two may never meet.

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Limericks, written by me: http://limericker.blogspot.com

i agree this is what i've been always thinking about

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<span style='color:purple'><span style='font-family:Impact'>i dont know much </span></span>

Aliens might be able to see in UV or Infrared light. Maybe they can see electricty.

We base what life has to be by what is on Earth, so yeas, it could be completely different.

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MacTalk - The Australian Apple Community - iPod, iPhone and Mac.

Technology has evolved to allow us to see things in many ways. Infrared, MRI, Radar, any of which could be mimiced by a biological system, some of which mimic biological systems... We have also developed ways to be invisible to those systems. It is safe to assume that any advanced civilzation of biologic forms we can recognize, will allow us to see them when they are good and ready... If they are still bumbling through their interstellar development like we are. We may find each other... See SETI thread...
Key point is we will probably find those like us first ... What if the earth is really a sentient force and we are the plague? But we can't see nor hear the communication? A different definition of intelligent life would be required. Right now I think the standard is if they can't call us on our cell phones they aren't intelligent enough to consider sentient. (yet another thread) I disagree, ala Gregory Bateson (coiner of "double bind" and cybernetics ((ipso facto computers)) godfather) I believe that all forms of life have sentience of a variety we are only beginning to decipher... Old enough to remember the "secret life of plants"? Look it up... :P It's an eye opener...
As per the radio astronomy issue, It depends how far away they are/were if they went through that stage. Although still miniscule in universe time, there's at least millions of light years out there that some civilization may have produced enough radio noise for us to detect if we are lucky...

Yea alien do exist and our human being also trying to communicate with them too, but because it costs too much to do this kinda stuff, I remember they send signal to other place from earth but no response, then they just listen to signals right now, cuz its cheap to do this kinda stuff :P

My teacher saids, there are 3 answers for this kinda evidence:

1. Because those alien is smart, and they try to send signal to us as well, but too far away, we cant recieve it

2. We are listening to the signal now, but those alien is also listening to the signal as well, so if no one sending signals, then both of us and the alien cant hear anything from each other

3. They are too lazy to do this stuff, they just stay at home and enjoy life :P

We are sending signals out into space all the time Littlemews. TV transmissions for example. Aliens 70 or so light years away should be able to watch the Berlin Olympic games now.

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Climate Change Australia

I admit that it is possible. It all depends on what course their technological evolution goes. But if they are investigating the world around them scientifically, sooner or later they will understand electromagnetic radiation etc. Maybe there are other ways to communicate though. I mean, on a basic level.

And something like that would require very very sensitive recievers, since it was a very local broadcast for Berlin only, I think?

Alien races could have extremely sensitive recievers.


Aliens may be able to naturally see different wavelengths of the EM spectrum. They might be able to see more of the EM spectrum than we do. We only see from 400 nm to 700 nm of the EM spectrum, which is only a small amount. If an alien race could see more, or different wavelengths, their technology would take a different course to ours. Especially in astronomy.

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MacTalk - The Australian Apple Community - iPod, iPhone and Mac.

I remember seeing (I believe on the SETI website, maybe NASA) that Earth's broadcasts are strong enough such that we could detect them 40 light years away (i.e., our SETI array could hear us that far away). And the signals we sent 40 years ago were strong enough (and probably getting stronger).

It's not very big, but it's certainly okay, considering we've only been broadcasting a short time

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Live long enough to see Space!

We can get to space as a species. The above link is information about life-extension (living longer) so that you can personally see a space-based civilization.

The MPrize (a prize to encourage life extension research now contains over 3 million dollars.

Myabe the alien was living like 41 light yrs from Earth, so 40 light yrs cant reach them

Every year we emit more and more broadcasts into space, although they are not intended for outer space the signals would be getting stronger and stronger. Also aliens probly have sensors far superior to what SETI has available to them.

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MacTalk - The Australian Apple Community - iPod, iPhone and Mac.

I have thinking about this for a long time , what if there is a)n) alien exist, and they come to Earth (Just one single Alien), then here's the problem:

1. As we know, our human being is kinda crusious about Alien, so they might kill them and take their body for study outer space object.

2. Usually its military that control everything, so they might think this is a top secret, and make up something for excuse to let the whole world know : there is no alien come to earth before.

3. They come to kill us

or 4. they land in Alice Springs and is immediately assimilated into the Todd tavern Hotel and are never seen again........

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Damien,
International Baccalaureate Physics teacher
Optics, Photogrammetry and Remote Sensing Instrumentation Major
Admin: Pacific Science and Art

Well, what are the chances they would contact us if they knew we existed and had the tools to do so?

good point starlab. Just think, their could be billions of civilizations in the universe, and there could be an alien species that knows this for a fact. the aliens advanced enough to know would only be concerned about species as good or greater than them, they would have nothign to learn from us, that would benefit them.

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My Blog

they are extra intelligent, they are looking busy with other developed planets, they are getting much response from the other planets where the life is in existence besides earth, then why they will contact the earth people,

have you seen the topic :if alien found what will be their language, they are understood that their language cannot be read by the people of earth till doday, that's why they gone to the other similar planet, may be? Kai rahul khare kee nahi?

In questions like this, I always answer by saying the following.

We cannont disprove any idea or reasoning on this as yet. However, we have as yet absolutely no indication, let alone any proof that life exists beyond the Earth. We can say that life may exist on Mars or under the sea of Europa or outside our solar system, but as yet there is no scientific evidence to support any of these theories. Only speculation, backed up by indicators of the required molecules present in Mars' case.

I for one think that there probably is life out there somewhere, but that life is far more thinly spread than we could hope, for us to be able to make 2 way communication possible. I also think that any life out there will be so different than we could ever imagine. We could well be very different ourselves from most 'normal' life in the universe, who knows?!

I have no proof of this, it is only gut instinct. Therefore, I totally respect anyone who disputes it! Always a good topic for arguement, but until people can prove their exotic theories on alien life with scientific evidence, then I have very little time for them.

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Of all the things I've ever lost, I miss my mind the most!

I agree there is as yet no hard evidence. Let's review the soft evidence, more accurately, "speculation fuel":

1. The laws of physics including those that determine the nature of chemical bonds have been observed through spectral analysis to be the same throughout the observable universe.

2. The required metallicity including the abundance of water has been observed to exist throughout the universe.

3. Planets have been observed to have formed/located around a number of stars.

4. Quite a few carbon based molecules including some similar to DNA/RNA building blocks have been observed in many locations within the MW.

5. Our existence and the existence of Earth's biota over the last 3.5 b