Relativity has a reputaion of bing a difficult subject. Yes, the mathematics required to describe the general theory involves difficult differential geometry. It is possible to describe the concepts of relativity without complex mathematics.
Modern science is interesting as it is built on the foundation work by many gifted individuals. People have become famous for standing on the shoulders of giants to make major discoveries. Some of the big names actually contributed little towards the subject that they became famous for.
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