Anybody looking for a more technical dive, Matt Strassler (String theorist formerly from UW, now poached to Rutgers) has an incredibly readable exposition here: http://profmattstrassler.com/articles-and-posts/relativity-s...
Anybody looking for a more technical dive, Matt Strassler (String theorist formerly from UW, now poached to Rutgers) has an incredibly readable exposition here: http://profmattstrassler.com/articles-and-posts/relativity-s...