| cesarea harbor | roman concrete | 2000 years of service life in saltwater | seasteading | ocean colonization technology bottleneck |
Ellmer
December 10, 2020, 12:37pm
#1
Ellmer
December 10, 2020, 12:38pm
#2
Ellmer
December 10, 2020, 12:38pm
#3
Ellmer
December 10, 2020, 12:39pm
#4
https://www.google.com/search?q=create-real-estate-where-there-was-none