By Date
venus like landscape
U42 4 comments
catalyzed fusion tset
U42 0 comments
Ultra star
U42 1 comments
deuterium fusion bomb
U42 1 comments
stacked alloy
U42 0 comments
Special alloy
U42 0 comments
pov stellar engine
U42 0 comments
better dyson sphere
U42 0 comments
dyson sphere
U42 3 comments
Shrapnel boom
U42 0 comments