1. Who invented Circulation of blood ?

Answer: William Harvey of Britain in 1628

2. Who invented Automatic rifle ?

Answer: John Browning of U.S.A. in 1918.

3. Who invented Aeroplane

Answer: Orville & Wilbur Wright in 1903

4. Who invented X-ray ?

Answer: W.K. Roentgen of Germany in 1895.

5. Who invented Open Heart Surgery ?

Answer:

Dr. Daniel Hale Williams

6. Who invented Laser ?

Answer:

Charles H. Townes

7. Who invented Electron ?

Answer: Thomson. J of Britain in 1897