Winston
Lorenzo von Matterhorn
- Joined
- Jan 31, 2009
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The aliens are silent because they're dead
January 21, 2016
https://phys.org/news/2016-01-aliens-silent-theyre-dead.html
Dr Chopra said their theory solved a puzzle.
"The mystery of why we haven't yet found signs of aliens may have less to do with the likelihood of the origin of life or intelligence and have more to do with the rarity of the rapid emergence of biological regulation of feedback cycles on planetary surfaces," he said.
A plausible solution to Fermi's paradox, say the researchers, is near universal early extinction, which they have named the Gaian Bottleneck.
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That stupidity has the unsually high reader share figure of 14768 shown at the bottom of that page, shares by what I would assume are people with above average critical thought skills. However, advancing that theory at this point in time based upon the fact that we haven't detected any alien transmissions is similar to a blind and deaf person sitting at center field at the Superbowl and claiming no one is in the stadium because they can't touch anyone with their outstretched arms. Here's why that's so:
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Our best SETI experiments to date could detect Earth-like leakage signals at no more than 1 light-years distance. So not too far. - DR. SETH SHOSTAK, January 2005
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Earth becoming invisible to aliens
Chances of earth being detected by alien life forms are disappearing because of the digital revolution, a leading space scientist has claimed.
2010
At a special meeting on the search for extraterrestrial intelligence (Seti), the US astronomer Frank Drake who has been seeking radio signals from alien civilisations for almost 50 years told scientists that earthlings were making it less likely they would be heard in space.
"The trouble is that we are making ourselves more and more difficult to be heard," said Dr Drake. "We are broadcasting in much more efficient ways today and are making our signals fainter and fainter."
In the past, TV and radio programmes were broadcast from huge ground stations that transmitted signals at thousands of watts. These could be picked up relatively easily across the depths of space, astronomers calculated.
Now, most TV and radio programmes are transmitted from satellites that typically use only 75 watts and have aerials pointing toward Earth, rather than into space.
"For good measure, in America we have switched from analogue to digital broadcasting and you are going to do the same in Britain very soon," Drake added. "When you do that, your transmissions will become four times fainter because digital uses less power."
"Very soon we will become undetectable," he said. In short, in space no one will hear us at all.
What is true for humans would probably also be true for aliens, who may already have moved to much more efficient methods of TV and radio broadcasting. Trying to find ET from their favourite shows was going to be harder than we thought, Drake said.
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A good comment on this found on-line:
While I applaud the dedication of those involved with SETI, the premise that aliens are transmitting signals compatible with our pre-conceived notion of what those signals should look like seems almost silly. I sit here typing on a Wi-Fi network- cheap, consumer electronics technology - that just 50 or so years ago would have been utterly undetectable to even the most advanced terrestrial receivers. (not quite true, but frequency hopping and spread spectrum technologies would have definitely seemed like alien tech back then and spread spectrum uses wide band, noise-like signals spreading the RF power over a wide frequency range making transmissions harder to detect, especially at cosmological distances. - W)
In the very short amount of cosmological time we have been using radio waves, we have produced radio technologies today that are oriented to low-power, encrypted, spread spectrum, hidden signals that we couldn't have possibly conceived of or detected just a short time ago.
Imagine alien civilizations that have likely have been using radio signals much longer than 100 years. Why do we persist in thinking we could detect their transmissions that are not just 100 years more advanced than us, but perhaps thousands or millions?
We know that on earth we used narrowband signals such as would have been detectable by SETI for just a brief blip of cosmological time. It's silly and foolish to think such an extremely narrow time window of an alien civilization progressing in their use of radio technology really forms a good basis for detecting them with a program like SETI.
January 21, 2016
https://phys.org/news/2016-01-aliens-silent-theyre-dead.html
Dr Chopra said their theory solved a puzzle.
"The mystery of why we haven't yet found signs of aliens may have less to do with the likelihood of the origin of life or intelligence and have more to do with the rarity of the rapid emergence of biological regulation of feedback cycles on planetary surfaces," he said.
A plausible solution to Fermi's paradox, say the researchers, is near universal early extinction, which they have named the Gaian Bottleneck.
-----
That stupidity has the unsually high reader share figure of 14768 shown at the bottom of that page, shares by what I would assume are people with above average critical thought skills. However, advancing that theory at this point in time based upon the fact that we haven't detected any alien transmissions is similar to a blind and deaf person sitting at center field at the Superbowl and claiming no one is in the stadium because they can't touch anyone with their outstretched arms. Here's why that's so:
-----
Our best SETI experiments to date could detect Earth-like leakage signals at no more than 1 light-years distance. So not too far. - DR. SETH SHOSTAK, January 2005
-----
Earth becoming invisible to aliens
Chances of earth being detected by alien life forms are disappearing because of the digital revolution, a leading space scientist has claimed.
2010
At a special meeting on the search for extraterrestrial intelligence (Seti), the US astronomer Frank Drake who has been seeking radio signals from alien civilisations for almost 50 years told scientists that earthlings were making it less likely they would be heard in space.
"The trouble is that we are making ourselves more and more difficult to be heard," said Dr Drake. "We are broadcasting in much more efficient ways today and are making our signals fainter and fainter."
In the past, TV and radio programmes were broadcast from huge ground stations that transmitted signals at thousands of watts. These could be picked up relatively easily across the depths of space, astronomers calculated.
Now, most TV and radio programmes are transmitted from satellites that typically use only 75 watts and have aerials pointing toward Earth, rather than into space.
"For good measure, in America we have switched from analogue to digital broadcasting and you are going to do the same in Britain very soon," Drake added. "When you do that, your transmissions will become four times fainter because digital uses less power."
"Very soon we will become undetectable," he said. In short, in space no one will hear us at all.
What is true for humans would probably also be true for aliens, who may already have moved to much more efficient methods of TV and radio broadcasting. Trying to find ET from their favourite shows was going to be harder than we thought, Drake said.
-----
A good comment on this found on-line:
While I applaud the dedication of those involved with SETI, the premise that aliens are transmitting signals compatible with our pre-conceived notion of what those signals should look like seems almost silly. I sit here typing on a Wi-Fi network- cheap, consumer electronics technology - that just 50 or so years ago would have been utterly undetectable to even the most advanced terrestrial receivers. (not quite true, but frequency hopping and spread spectrum technologies would have definitely seemed like alien tech back then and spread spectrum uses wide band, noise-like signals spreading the RF power over a wide frequency range making transmissions harder to detect, especially at cosmological distances. - W)
In the very short amount of cosmological time we have been using radio waves, we have produced radio technologies today that are oriented to low-power, encrypted, spread spectrum, hidden signals that we couldn't have possibly conceived of or detected just a short time ago.
Imagine alien civilizations that have likely have been using radio signals much longer than 100 years. Why do we persist in thinking we could detect their transmissions that are not just 100 years more advanced than us, but perhaps thousands or millions?
We know that on earth we used narrowband signals such as would have been detectable by SETI for just a brief blip of cosmological time. It's silly and foolish to think such an extremely narrow time window of an alien civilization progressing in their use of radio technology really forms a good basis for detecting them with a program like SETI.
