"Relativity: The Special and General Theory"

"Relativity: The Special and General Theory" by Einstein explains how the concepts of space, time, and gravity are interconnected. Special relativity shows that measurements of time and space change for observers moving at different speeds, especially near the speed of light. It introduces the idea that nothing can travel faster than light and that mass and energy are related (E=mc²). General relativity expands this to include gravity, describing it as the curvature of spacetime caused by mass and energy. Together, these theories revolutionized our understanding of the universe's structure and behavior.