Impossibility refers to the state or condition of something that cannot happen or be achieved. It often arises in discussions about physical laws, logical reasoning, or practical limitations. For example, certain actions, like traveling faster than the speed of light, are deemed impossible according to the laws of physics as described by Albert Einstein. In philosophy, impossibility can also relate to concepts that cannot exist or be realized, such as a square circle. These discussions help clarify the boundaries of what is feasible and challenge our understanding of reality, encouraging deeper exploration of both theoretical and practical limits.