One invention can be the microscope.
Because of the microscope, it was not possible to study medicine and biology even further and studying medicine in the scientific revolution had a huge impact on extending the expected life length of people and to help them live in better conditions and survive diseases that are now easily treated but then were problematic.
Another can be the telescope.
The telescope made it possible for astronomers to observe the patterns in the sky much better and this was a huge thing in things like exploration, mathematics, physics, and other parts of science that were rapidly developed in the scientific revolution age. The telescope made it possible to prove many things that were considered wrong by the wide population.
