#World_Greatest_Inventions👈🥰💯❤️
1. Who invented the telephone?
Alexander Graham Bell
2. Who invented the railway engine?
George Stephenson
3. Who invented Radar?
– Heinrich Hertz
4. Who invented polio vaccine (oral)?
Albert Sabin
5. Who developed the small pox vaccination?
Edward Jenner
6. Which was to be discovered first in the chromosphere of the sun?
Helium
7. What famous scientist and inventor participated in the invention of the Aqua-Lung?
Jacques Cousteau
8. Vulcanised rubber was invented by?
Charles Goodyear
9. The system for writing by blind people was invented by?
Louis Braille
10. The steam engine was invented by?
James Watt
11. The revolver was invented by?
Samuel Colt
12. The nuclear reactor was invented by?
Enrico Fermi
13. The laws of floating bodies was discovered by?
Archimedes
14. The four blood groups were discovered by?
Karl Landsteiner
15. The existence of isotopes was discovered by?
Frederick Soddy
16. The electro-cardiograph was invented by?
Willem Einthoven
17. Stethoscope was invented by?
Rene Laennec
18. Spinning frame was invented by?
Richard Arkwright
19. Sodium was discovered by?
Humphry Davy
20. Safety matches was invented by?
Johan Edvard Lundstrom
21. Rayon was invented by?
Georges Audemars
22. Radium was discovered by?
Marie and Pierrie Curie
23. Radioactivity was discovered by?
Henri Becquerel
24. Nylon was invented by?
Wallace Carothers
25. Microscope was invented by?
Zacharias Janssen
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