1. In which year did the Berlin Wall fall, marking the symbolic end of the Cold War?

2. In what year was the Berlin Wall first erected to separate East and West Berlin?

3. What biological agent is responsible for causing the bubonic plague known as the Black Death?

4. Which Ottoman leader commanded the forces that captured Constantinople in 1453?

5. Who was the primary leader of the Haitian Revolution and a former slave himself?

6. What was the name of the document signed at Seneca Falls that demanded equal rights for women?

7. In which lunar region did the Apollo 11 Lunar Module 'Eagle' land?

8. What does the Russian word 'Sputnik' mean in English?

9. The bankruptcy of which major investment bank in September 2008 is seen as the climax of the financial crisis?

10. At which location did the Wright brothers perform their historic first flight in 1903?

11. In which year was the wreck of the RMS Titanic finally discovered?

12. How many African representatives were present at the Berlin Conference of 1884?

13. What did Isaac Newton's 'Law of Universal Gravitation' successfully explain for the first time?

14. What was the primary chemical process used in the Bessemer converter to turn iron into steel?

15. Which Spartan King led the Greek forces at the Battle of Thermopylae?

16. What is the name of the only confirmed Viking archaeological site in North America?

17. What did the Apollo-Soyuz mission symbolize for Cold War relations?

18. What type of organism did Alexander Fleming discover was capable of killing bacteria in 1928?

19. At which research organization was the World Wide Web invented?

20. The Battle of Stalingrad was fought between which two primary nations?