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

they didn't they thought that is was flat and if you sailed to far the you would fall off the edge of the earth.

Explanation:

no options provided, here,but the answer to this question is often: a historian cites a japanese newspaper article published a year after the end of world war ii in order to draw conclusions about the effect of the war on the japanese economy.

clearly from the answer, the historian alludes to historical sources,and records to aid in analyzing and drawing conclusion on the effect of the war on the economy of japan.