it is a discovery not an invention
what is the invention or discovery of Yuri Milner
discovery
The discovery of the cell was possible due to the invention of the microscope.
it would be an invention
Invention is to make something new while discovery is to find something that is already existed.
The invention of the microscope paved the way for the discovery of the microscopic world.
the invention
Invention makes or develops something that did not exist. Discovery finds real (non-abstract) things that are already exsistant.
Discovery I think, ask Sir Issac Newton about the apple...
Three causes of Cultural change are, migration, trade, and warfare.
electron microscope