Figure 1: Mean distance between civilizations: 1,000 light-years
Mean duration for every civilization: 10,000 years

Figure 2: Mean distance between civilizations: 1,000 light-years
Mean duration for every civilization: 1,000 years
 
Figure 3: Mean distance between civilizations: 2,000 light-years
Mean duration for every civilization: 10,000 years
 
Figure 4: Mean distance between civilizations: 2,000 light-years
Mean duration for every civilization: 1,000 years

Figure 5: Mean distance between civilizations: 2,000 light-years
Mean duration for every civilization: several hundred-thousand years

Figure 6: Mean distance between civilizations: 2,000 light-years
Mean duration for every civilization: several hundred-thousand years