Watch Inside Einstein's Mind: The Enigma of Space and Time (2015) : Full Movie Online Free In November 1915, Einstein published his greatest work: General Relativity, the theory that transformed our understanding of nature's laws and the entire history of the cosmos. This documentary tells the story of Einstein's masterpiece, from the simple but powerful ideas at the heart of relativity to the revolution in cosmology still playing out in today's labs, revealing Einstein's brilliance as never before.