Original sentence: It was introduced in Albert Einstein's 1905 paper "On the Electrodynamics of Moving Bodies".Special relativity is a theory of the structure of spacetime.Special relativity is based on two postulates which are contradictory in classical mechanics:
Edited sentence: Einstein's theory explains how energy can be put into spacetime, Einstein's "mix" of space with time.However we may never fully understand space and how it works.The Theory of Relativity has just been regarded as E=MC2, in fact this theory developed by Albert Einstein contains much more.With each new theory humanity gets closer to solving the riddle of space