In the year 1931 Ernst invented the Electron microscope it let biologist see virus and the structure inside the cells.
It let biologists see viruses and the structure inside the cells. In the year 1931 Ernst invented the microscope.
In the year 1931 Ernst invented the microscope. It let biologists see viruses and the structure inside the cells.
In the year 1931 Ernst invented the microscope. It let biologists see viruses and the structure inside the cells.