[ExI] Eternity in six hours: intergalactic spreading of intelligent life and sharpening the Fermi paradox

[Andrew Mckee]

On Tue, 10 Sep 2013 08:54:59 +1200, John Clark <johnkclark at gmail.com>  
wrote:


> I think we could probably detect a Dyson sphere with its distinctive
> infrared signature if it were within several thousand light years of us,
> and we could see a galaxy of Dyson spheres if there were one anywhere in
> the observable universe. But we see nothing.

I wonder how water tight the idea is - that Dyson spheres would emit  
infrared radiation?

Maybe dark matter is Dyson spheres whose inhabitants have figured out  
perfect or near perfect complete thermal management, and to whom any form  
of leakage is woefully irresponsible wastage.

Maybe it's a natural evolution that shortly after technologically advanced  
species develop immortality they conclude that sitting around waiting for  
their sun/s to die off or explode is a really bad idea, especially if they  
have the technical means to extend its life span through the complete  
recycling of its emitted radiation.