1. Who discovered penicillin in 1928?

2. Who was the famous civil rights leader who delivered the "I Have a Dream" speech?

3. Who led India’s nonviolent independence movement against British rule?

4. Who was the first emperor of China?

5. What legal principle is the Code of Hammurabi most famous for establishing?

6. During which long-running conflict did Joan of Arc lead French forces?

7. On which island was Nelson Mandela imprisoned for 18 of his 27 years in jail?

8. What was the name of the secret network of routes and safe houses used by Harriet Tubman?

9. Which astronomical model did Copernicus challenge with his heliocentric theory?

10. What massive collection of clay figures was built to protect Qin Shi Huang in the afterlife?

11. What is the name of the process Pasteur developed to kill harmful bacteria in food and drink?

12. Frida Kahlo's work is often associated with which artistic movement, though she resisted the label?

13. Eleanor of Aquitaine was the mother of which famous English king who led the Third Crusade?

14. What was the code name for the top-secret U.S. project to build the atomic bomb?

15. Rosa Luxemburg was a co-founder of which revolutionary group in Germany?

16. Which high-level programming language was heavily influenced by Grace Hopper's work on compilers?

17. In 2014, Malala became the youngest recipient of which prestigious award?

18. In which famous West African city did Mansa Musa establish the University of Sankore?

19. What field of study did Sigmund Freud found?

20. What was the name given to the period of stability and trade enabled by the Mongol Empire?