I'm trying to find the EXACT DATE when Albert Einstein published his theory of relativity and when his famous equation e=mc2 was published, and also a short summary (a couple sentences) of the importance of these two items. ***NOTE***: I have researched all the obvious sources like history.com, wikipedia, About.com, and every common online source. The problem is there are many conflicting dates out there. ------ What I want from you is DEFINITIVE, AUTHORITATIVE 100% certainty of the exact date of when he published these two things -- and also a couple lines summarizing the important of these two items (such as, "it was a pillar of modern physics.") Nothing too in-depth, just a precise summary & dates. Thank you.