1. Who invented Bacteria ?

Answer: Leeuwenhock of Netherlands in 1683

2. Who invented Open Heart Surgery ?

Answer:

Dr. Daniel Hale Williams

3. Who invented Ball-Point Pen ?

Answer: John J. Loud of U.S.A. in 1888

4. Who invented Atomic numbers ?

Answer: Moseley of Britain in 1913

5. Who invented Printing Press ?

Answer:

Johannes Gutenberg

6. Who invented Ballistic missile ?

Answer: Wemher von Braun of Germany in 1944.

7. Who invented CT scan ?

Answer: Hounsfield by Britain in 1973.