Shear-thickening fluids are unique materials that become more viscous when subjected to stress or shear forces. Unlike most fluids that thin out when stirred, these fluids resist flow and become thicker, which can be useful in various applications. Common examples include certain types of cornstarch mixed with water, often referred to as "oobleck." This behavior occurs due to the interactions between the particles suspended in the fluid. When stress is applied, the particles come closer together, creating a temporary solid-like structure that increases resistance to flow. This property has potential applications in protective gear and automotive industries, where materials need to absorb impacts.