22 Feb '12 02:27>
Originally posted by Shallow Blue
We've looked at the electromagnetic output from thousands of sources - millions, if you count SETI@Home. Not one of them showed the kind of pattern you would expect from an intelligent broadcast. At least, not one of them showed the kind of pattern you would get from our kind of intelligence. On that count, at least, we are exceptional.
Now, of ...[text shortened]... ife there, or anywhere. There's life here. That's exceptional, right there.
Richard
This statement was made, the thread is closed but I wanted to add my 3.14159 cents worth: All that shows is we may have missed a wavefront of RF that came and went and we were just in the wrong place at the wrong time.
Like I said, suppose we have start sending out RF and one of several things happen where we stop sending RF, for instance, we convert everything on Earth to fiber optics and give up transmitting RF, maybe convert the stuff that needs to go by RF, we now do with short range IR.
So as we are doing now, a tremendous amount of information is flying across the globe via the internet but not much of that is getting off the planet due to satellites sending signals down to earth and earths stations sending out signals that can be picked up but say at some point we develop some other technique, say X ray lasers that can transmit Exabytes of data per second and so we give up the RF thing.
So another civilization hears the start of our transmissions and then a couple hundred years later, no more RF. Do they then conclude we all died? Had a major war? Hit by an asteroid? None of those things happened, we just went to a different technology.
That could happen quickly, say within one hundred years, we might find better, cheaper, less energy intensive means of transmitting a trillion times the information we used to send but with no RF. So we then have a short wavefront, say less than 500 years of transmitting RF.
That is a very short time on the galactic scale, and that 500 year wavefront of detectable RF can come and go and be gone and another civilization just like ours would miss it completely. So it might be with the lack of detection we already have gone through.
We've looked at the electromagnetic output from thousands of sources - millions, if you count SETI@Home. Not one of them showed the kind of pattern you would expect from an intelligent broadcast. At least, not one of them showed the kind of pattern you would get from our kind of intelligence. On that count, at least, we are exceptional.
Now, of ...[text shortened]... ife there, or anywhere. There's life here. That's exceptional, right there.
Richard
This statement was made, the thread is closed but I wanted to add my 3.14159 cents worth: All that shows is we may have missed a wavefront of RF that came and went and we were just in the wrong place at the wrong time.
Like I said, suppose we have start sending out RF and one of several things happen where we stop sending RF, for instance, we convert everything on Earth to fiber optics and give up transmitting RF, maybe convert the stuff that needs to go by RF, we now do with short range IR.
So as we are doing now, a tremendous amount of information is flying across the globe via the internet but not much of that is getting off the planet due to satellites sending signals down to earth and earths stations sending out signals that can be picked up but say at some point we develop some other technique, say X ray lasers that can transmit Exabytes of data per second and so we give up the RF thing.
So another civilization hears the start of our transmissions and then a couple hundred years later, no more RF. Do they then conclude we all died? Had a major war? Hit by an asteroid? None of those things happened, we just went to a different technology.
That could happen quickly, say within one hundred years, we might find better, cheaper, less energy intensive means of transmitting a trillion times the information we used to send but with no RF. So we then have a short wavefront, say less than 500 years of transmitting RF.
That is a very short time on the galactic scale, and that 500 year wavefront of detectable RF can come and go and be gone and another civilization just like ours would miss it completely. So it might be with the lack of detection we already have gone through.