Who did Ptolemy influence and how?

He made contributions to astronomy, mathematics, geography, musical theory, and optics. he came up with the geocentric theory which changed everything because before him, people believed in the heliocentric theory

The transcontinental railroad provided a means of fast transportation. it cut a 6 month trip into 6 days, created jobs for many people and encouraged immigration. the homestead act played a huge role in western expansion; it allowed settlers to begin a fresh start, and gave them land in exchange for their residence for up to five years and a small fee.