Dyson spheres and invisible ETIs
A bit of debate is happening across the blogoverse about Dyson spheres, their non-observation, and what ETIs might do instead.
The argument started here...
Search for Dyson Spheres
...and was picked up by Karl Schroeder...
The Invisibility of Advanced Civilizations
...and Centauri Dreams...
Dyson Spheres - Hoping to be Surprised
...and even Brian Wang chipped in...
ETs Vanishing act
...so I thought it'd be good topic over here. What do y'all think? Does ET vanish from view when they get advanced enough?