747400, on 02 February 2012 - 04:05 PM, said:
What a great big truckload of drivel. Didn't this ludicruous argument come up before? I suppose this Prof. Hair does know how big this one galaxy, let alone the whole Universe, is, does he?
Well I assume that they do since what Hedman and Hair have done is taken a Model of the Galaxy and introduced an algorithm to represent an "emergent civilization" colonises the nearest star, then the algorithm allows for the daughter colony a one in four chance of colonising it's nearest star and so fourth.
747400, on 02 February 2012 - 04:05 PM, said:
But he's concluded that, just because he doesn't believe that we, on this one planet out of, almost certainly, millions (if the theory that every single star might have at least one Planet is right), haven't heard from another civilisation yet, that means they don't exist anywhere? Where do these people get their qualfications from? Something they clicked on from Google Ads?
Surely you mean hundreds of Billions, not millions? But no, what they are saying is that based on the lowest assumptions in their algorithm the Galaxy is still more or less completely colonised after 250 million years.
747400, on 02 February 2012 - 04:05 PM, said:
* The more I read that story, the dafter it gets. "Any ancient civilization is probably not biological."? What on earth is that supposed to mean? They're disembodied intelligences? How does he conclude that that's probably the case?
Who knows? But that said, we've developed artificial organs over the last few decades, imagine what we can be like or do in 100 Million years from now.
747400, on 02 February 2012 - 04:05 PM, said:
"Whatever the reason we're being ignored, there is no chance ET, if he exists, does not know we are here, Hair said, pointing to telescopes, such as NASA's Kepler observatory, which can detect planets around other stars." Again, I'm sorry? We've recently been able to deduce that there are most probably planets around nearby stars from observing gravitational wobbles and so on, but I don't think we've been able to actually look at them yet, let alone tell if there's likely to be any civilisations on them. What is this guy on? And what kind of a name is Professor Hair anyway?
Actually Kepler is directly observing extrasolar planets as they transit their Stars. The next generation of Space telescopes should have the technology to block out Starlight and allow us to photograph exoplanets.
Here is the abstract.
http://jointmathemat...077-90-2299.pdf
While short this is a better article than that presented in the OP.
http://www.economist...al-intelligence
Whoever fights monsters should see to it that in the process he does not become a monster. And if you gaze long enough into an abyss, the abyss will gaze back into you. - Friedrich Nietzsche