Albert Einstein's theories of relativity, particularly the special and general theories, introduced revolutionary ideas that changed our understanding of space, time, and gravity. The special theory, published in 1905, established the concept that the laws of physics are the same for all observers and introduced the equation \(E=mc^2\), revealing the equivalence of mass and energy. The general theory, released in 1915, expanded the understanding of gravity, proposing that massive objects warp the fabric of spacetime. Together, these principles not only transformed the field of theoretical physics but also had significant implications for modern technology and cosmology, reshaping our comprehension of the universe.