“By weaving threads of physics, chemistry and biology into a rich tapestry, this remarkable scientist provided a unifying molecular view of the world... He touted the wonderful properties of Vitamin C first as a cure of common cold and later as a preventive agent against cancer.” One of science's major figures of all time referred to above is

1. The question describes a remarkable scientist and asks to identify him. 2. Key descriptors: "weaving threads of physics, chemistry and biology into a rich tapestry", "provided a unifying molecular view of the world", "touted the wonderful properties of Vitamin C first as a cure of common cold and later as a preventive agent against cancer". 3. This profile perfectly matches Linus Carl Pauling (1901-1994). - He was a pioneering chemist who made fundamental contributions to understanding chemical bonding and molecular structure, integrating principles from physics, chemistry, and biology. - He is one of the few individuals to have won two Nobel Prizes in different fields (Chemistry and Peace). - Later in his career, he became a strong advocate for the health benefits of high doses of Vitamin C, claiming it could prevent or treat the common cold, cancer, and other diseases, although these claims remain controversial. 4. The other scientists listed (G.N. Lewis, Fritz London, Walter Heitler) were significant figures in chemistry and physics but do not fit the description, particularly regarding the advocacy for Vitamin C.