Source
Istituto di Genetica Biochimica ed Evoluzionistica, CNR, Pavia, Italy. mazzarello@igbe.pv.cnr.it
Abstract
After the first observations of life under the microscope, it took two centuries of research before the 'cell theory', the idea that all living things are composed of cells or their products, was formulated. It proved even harder to accept that individual cells also make up nervous tissue.