Best sign of extraterrestrial intelligence?

[Aquamarine]

http://www.planetary.org/news/2004/dyson_spheres.html

 

[tumor]

Best sign of extraterrestial inteligence is that no extraterrestials conntacted us.

 

[MiGUi]

I think that cockroaches are extraterrestrial. Thats for sure. If you cut their head off, they died by inanition in a few days. That is horrible! And also they are intelligent, they leaves you in peace when they want, not when you want no matter you use poisson or not.

 

[Leo32]

The best proof of extra terrestrial intelligence is that they never contacted us...

Greetz,
Leo

 

[FieryIce]

I think this image displays the best yet sign of extraterrestrail intelligence, the sign that SETI missed.

Planetary Photojournal

 

[Gil Fuller]

Energy shortage?

Any advanced alien civilization which had enough excess energy to build a 'Dyson Sphere' would certainly not need to build one to get more energy.

 

[Aquamarine]

Any advanced alien civilization which had enough excess energy to build a 'Dyson Sphere' would certainly not need to build one to get more energy.

You may mistake a Dyson shell for a Dyson "swarm" of satellites. The later could start in the near future. One could argue that the first satellite using solar power were the first part of a Dyson "swarm".

See also:
http://www.nada.kth.se/~asa/dysonFAQ.html