1. Who invented Radar ?

Answer:

Sir Robert Watson-Watt

2. Who invented Telescope ?

Answer: Hans Lippershey of Netherlands in 1608.

3. Who invented watch ?

Answer:

Peter Henlein invented the first portable time piece in 1504

4. Who invented Printing Press ?

Answer:

Johannes Gutenberg

5. Who invented Vitamin D ?

Answer:

Edward Mellanby discovered Vitamin D while researching a disease called rickets in 1922

6. Who invented Machine Gun ?

Answer:

Helge Palmcrantz, Swedish inventor and industrialist

7. Who invented HIV ?

Answer: