1. Who discovered "Rubella"?
Stanley Plotkin
2. Who invented "Safety Lamp"?
Sir Humphry Davy
3. Who invented "Safety Match"?
John Walker
4. Who invented "Sewing Machine"?
Barthelemy Thimmonier
5. Who discovered "Sex Hormones"?
Eugen Steinach
6. Who invented "Ship (steam)"?
JC Perier
7. Who invented "Ship (turbine)"?
Sir C. Parsons
8. Who invented "Smallpox Vaccination"?
Edward Jenner
9. Who discovered "Sodium"?
Humphry Davy
10. Who discovered "South Pole"?
Amundsen
11. Who invented "Steam Engine"?
James Watt
12. Who invented "Stethoscope"?
Rene Laennec
13. Who invented "Streetcar"?
Thomas Davenport
14. Who invented "Submarine"?
David Bushnell
15. Who invented "Supercomputer"?
J.H. Van Tassel and Seymour Cray
16. Who invented "Tank"?
Sir Ernest D Swington
17. Who invented "Telegraph"?
Samuel Morse
18. Who invented "Telephone"?
Alexander Graham Bell
19. Who invented "Thermionic valve"?
J.A. Fleming
20. Who invented "Thermos Flask"?
Sir James Dewar