The traits of civilization are: specialized workers, advanced technology, advanced cities, and complex institutions.
Other then this, not sure what you want me to answer
There were two major peaks of defense spending in the 20th century: World War 1
Astronomers have been trying to figure out how many galaxies there are in the cosmos for a long time. To get their estimate, they employ a technique known as "representative sampling." They count the number of galaxies in each sector by dividing the sky into equal-sized parts.
My good man we need too see our options in order to answer your question :)
