In 1804, Lewis and Clark began the first exploration of the American west. They began their journey in St. Louis, and followed which river westward for 1,000 miles ?

In what year did the Titanic sink?

What wall divided Berlin from 1961 to 1989?

Which ancient wonder was located in Alexandria, Egypt?

Which empire was ruled by Genghis Khan?

During World War I, the allies, Britain, France, the USA primarily fought against Germany and which two major forces?

What is the second largest city in Japan?