1. Who invented Printing Press ?

Answer:

Johannes Gutenberg

2. Who invented Safety razor ?

Answer: King Camp Gillette of U.S.A. in 1903

3. Who invented Radiocarbon ?

Answer:

Willard Libby

4. Who invented Vitamin D ?

Answer:

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

5. Who invented Submarine ?

Answer:

John Philip Holland

6. Who invented DNA Structure ?

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

7. Who invented Aspirin ?

Answer:

Felix Hoffmann invented Aspirin