This Scottish missionary and explorer discovered the Zambesi River in 1851, Victoria Falls in 1855, and later looked for the source of the Nile River. Who was he?

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?