Publication of *Philosophical and Physical Opinions*, introducing Cavendish's original natural philosophy.
On January 1, 1663, Margaret Cavendish published Philosophical and Physical Opinions, in which she set forth her unique theories in natural philosophy, particularly atomism. This work highlighted her materialistic approach during a time when women's participation in philosophical debates was abnormal. It marked a major contribution, as she articulated an original theory of atomism, building upon yet distinct from her contemporaries.