Iovium
Iovium, also known as Jupiter's fluid, is a hypothetical substance proposed by the Italian physicist Luigi Galvani in the late 18th century. Galvani observed that the legs of dead frogs would twitch when touched by two different metals, and he attributed this phenomenon to a vital fluid within the frogs that he named "iovium." This fluid was believed to be responsible for the life and movement of living organisms. Galvani's work laid the foundation for the study of bioelectricity and the understanding of nerve and muscle function. However, the existence of iovium as a distinct substance was later disproven, and the phenomenon was explained by the principles of electricity and chemistry. Despite its eventual discrediting, Iovium remains an important historical figure in the development of modern biology and physiology.