How long has rail road been around for?

What cultural similarities were shared by the diverse peoples of the Western Hemisphere in the 1490s and why? Did ancient Rome houses have doors? What does hinterwelter mean? Who was Otto van Bismarck? How did Romans react to the religions of the people they conquered early in their history? How long did it take to make the flushing toilet? What is a western newcomer called? Who invented underpants? What two officials were most important in the roman empire? What was that goal of the crusades? Why was the western front so significant? How many days were in the year 1865? What was papal supremacy in the middle ages? What city was Giovanni Villani describing in the 14th century when he wrote the daughter and creature of Rome? What enabled freer artistic expression during the Renaissance period? When were roads invented? Where does the name Hart come from? What caused the civil war in rome? What happened after the nomads came to America and what continent did they come from? How did the religious rivalries in western Europe affect the Americas?