(Przykład) 1. When was the dynamite invented?

2. When was the first mobile made?

3. When was Mona Lisa painted?

4. When was DNA discovered?

5. When was Eiffel Tower constructed?

6. When was the Great Pyramidy of Giza built?

7. When was fistr photograph taken?

8. When was The first Harry Potter story written?

9. When was Mount Everest climbed for the first time?

10. When was first human voice recorded?