Brownian Motion is an educational film produced by the Massachusetts Institute of Technology (MIT) between 1955 and 1975. The film illustrates the phenomenon of Brownian motion, which refers to the random movement of particles suspended in a fluid, resulting from their collision with fast-moving molecules in the fluid. This motion provides evidence for the kinetic theory of matter and the existence of atoms and molecules. The film likely includes microscopic footage demonstrating this erratic movement, serving as a visual aid for physics education.