1. Who invented Relativity Theory ?

Answer: Einstein of Germany in 1905.

2. Who invented Java Language ?

Answer:

James Gosling

3. Who invented Circulation of blood ?

Answer: William Harvey of Britain in 1628

4. Who invented Bacteria ?

Answer: Leeuwenhock of Netherlands in 1683

5. Who invented Aeroplane

Answer: Orville & Wilbur Wright in 1903

6. Who invented Safety Pin ?

Answer: Walter Hunt of U.S.A. in 1849

7. Who invented CT scan ?

Answer: Hounsfield by Britain in 1973.