What were science/tech contributions for Ancient Rome

Along with concrete,the Romans used stone,wood,and marble for building materials. They used these materials to construct civil engineering projects for their cities and transportation devices for land and sea travel. The Romans also contributed to the development of technologies of the battlefield.

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evaluate the extent to which the seven years' war (french and indian war, 1754–1763) marked a turning point in american relations with great britain, analyzing what changed and what stayed the same from the period before the war to the period after it.