1. Who invented DNA Structure ?

Answer: Crick(UK), Waston(US), Wilkins(UK) in 1951

2. Who invented Open Heart Surgery ?

Answer:

Dr. Daniel Hale Williams

3. Who invented Machine Gun ?

Answer:

Helge Palmcrantz, Swedish inventor and industrialist

4. Who invented Ballistic missile ?

Answer: Wemher von Braun of Germany in 1944.

5. Who invented paper ?

Answer:

Cai Lun

6. Who invented Microphone ?

Answer:

Emile Berliner invented the first microphone in 1876.

7. Who invented Laser ?

Answer:

Charles H. Townes