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

2. What modern sporting event is named after the legend of a messenger following the Battle of Marathon?

3. Which Enlightenment philosopher's ideas on 'natural rights' most heavily influenced the drafting of the Declaration of Independence?

4. Approximately how many chemical base pairs were sequenced during the Human Genome Project?

5. In what year did Steve Jobs first unveil the iPhone to the public?

6. In which country did the Arab Spring protests begin in late 2010?

7. Which scientist's X-ray diffraction images (specifically Photo 51) were critical for discovering the DNA double helix?

8. Which explorer led the Norwegian team that first reached the South Pole in 1911?

9. From which animal did Edward Jenner derive the material for the first-ever vaccine?

10. What was the name of the 'floating gardens' or artificial islands used by the Aztecs for agriculture?

11. Who became the King of England as a result of the Battle of Hastings?

12. What is the traditional name for the day Julius Caesar was assassinated?

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

14. Which Roman city was buried alongside Pompeii during the eruption of Mount Vesuvius in 79 AD?

15. What was the name of the double crown worn by pharaohs to symbolize the unification of Upper and Lower Egypt?

16. Which famous female pharaoh led a major trade expedition to the Land of Punt?

17. What was the primary function of the Sputnik 1 satellite?

18. What was the name of the spacecraft that carried Yuri Gagarin into orbit?

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

20. Which U.S. President described the attack on Pearl Harbor as a 'date which will live in infamy'?