I heartily recommend this book, and please stop saying Einstein was right again
PROBLEMS OF GRAVITY
By
Marianne Freiberger
PlusMathsOrg, July 23, 2014
Albert Einstein is an icon and for good reason. His general theory of relativity, which describes the force of gravity, was an intellectual tour de force. Not only were his ideas entirely new, they have also stood the test of time. Despite this success, some physicists are doing what many would consider sacrilege: they are tinkering with the theory, producing modified versions of it. But why?
