1. Who invented DNA Structure ?

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

2. Who invented Proton ?

Answer:

Ernest Rutherford

3. Who invented Open Heart Surgery ?

Answer:

Dr. Daniel Hale Williams

4. Who invented Logarithms ?

Answer:

John Napier (Scotland) invented Logarithm

5. Who invented Steam Engine (Piston)

Answer: Thomas Newcomen of Britain in 1712

6. Who invented Steam Engine ?

Answer: Thomas Savery of Britain in 1698

7. Who invented Stainless Steel ?

Answer: Harry Brearley of Britain in 1913.