Before telescopes and spaceships, how did people know that Earth is round?

How did the economic impacts of the great depression differ in the united states and in the soviet union?

The soldiers in the novel use the phrase "it all looked good on paper" several times throughout their experiences. what does this mean in the context of the war?

How did the writing of the constitution demonstrate the political process? definition of political process by merriam webster: the process of the formulation and administration of public policy usually by interaction between social groups and political institutions or between political leadership and public opinion.