04-22-2015, 03:13 PM
It's also possible that Dyson spheres do exist (say built around small red dwarf stars with 10^12+ year lifetimes), just not in huge numbers in those particular galaxies, or our own.
There's a big difference between a Type II and a Type III civilization.
After they've spread enough, and hardened themselves against cosmic existential threats, you've got to wonder what the point is in growing larger and larger across a galaxy. All they would be doing is more of the same.
There's a big difference between a Type II and a Type III civilization.
After they've spread enough, and hardened themselves against cosmic existential threats, you've got to wonder what the point is in growing larger and larger across a galaxy. All they would be doing is more of the same.