Christopher Columbus was from Genoa Italy and he sailed for Spain .He discovered America and made a total of four trips from 1942- 1504 . He established trades between Europe and Americas which was referred to the new world.
The production of cars they made them one way more affordable without options for mass production
One of the most important was climate changes. As climate changed, nomads had to find new places to migrate to which led to people going to areas that were uninhabited before. Another was the development of agriculture which more or less ended the nomadic way of life when people started settling.
After Qin Shi's was killed in 207 BC the dynasty collasped totally because the power was too centralized.
