Langton's Ant is a simple two-dimensional automaton where an "ant" moves on a grid of Black and White cells. On White cells, it turns right, flips the cell to Black, and moves forward; on Black cells, it turns left, flips the cell to White, and moves. Initially, its movement appears random, but over time it forms a predictable pattern known as a "highway," showcasing how order can emerge from simple, deterministic behavior.