1. Discovery of Gravity
Inventor: Isaac Newton
2. Theory of Relativity
Inventor: Albert Einstein
3. Discovery of Penicillin
Inventor: Alexander Fleming
4. Invention of the Telephone
Inventor: Alexander Graham Bell
5. Invention of the Light Bulb
Inventor: Thomas Edison
6. Discovery of the Electron
Inventor: J.J. Thomson
7. Discovery of Radioactivity
Inventor: Henri Becquerel
8. Invention of the World Wide Web
Inventor: Tim Berners-Lee
9. Discovery of Insulin
Inventor: Frederick Banting and Charles Best
10. Invention of the Airplane
Inventors: Wright Brothers (Orville and Wilbur Wright)
11. Discovery of Radium and Polonium
Inventor: Marie Curie
12. Invention of the Printing Press
Inventor: Johannes Gutenberg
13. Discovery of the Structure of DNA
Inventors: James Watson and Francis Crick
14. Invention of the Steam Engine
Inventor: James Watt
15. Discovery of the Circulation of Blood
Inventor: William Harvey
16. Invention of the Computer
Inventor: Charles Babbage
17. Discovery of Oxygen
Inventor: Joseph Priestley
18. Invention of the Vaccine for Smallpox
Inventor: Edward Jenner
19. Invention of the Safety Lamp for Miners
Inventor: Humphry Davy
20. Invention of Dynamite
Inventor: Alfred Nobel