Every person in the world has heard something about the famous theory of relativity, but few people understand its essence. But Albert Einstein’s theory revolutionized not only physics, but throughout modern science, and completely changed our view of the world! Einstein's revolutionary idea of unifying time and space has been a source of delight and disappointment, surprise and brilliant insight for the most inquisitive minds for more than a hundred years. The story of the path to understanding this comprehensive theory is in itself extraordinary, and therefore it should be told to the world. British astrophysicist Pedro Ferreira decided to repeat the success of Stephen Hawking and wrote a popular science book in which he clearly explains to people far from complex matters what the theory of relativity is and why the controversy around it still does not subside.