1905 Albert Einstein publishes the article "On the Electrodynamics of Moving Bodies", in which he introduces special relativity.
1905 The physics journal Annalen der Physik published Albert Einstein's paper "Does the Inertia of a Body Depend Upon Its Energy Content?", introducing the equation E=mc².
1905 Albert Einstein's paper, ''Does the Inertia of a Body Depend Upon Its Energy Content?'', is published in the journal "Annalen der Physik". This paper reveals the relationship between energy and mass. This leads to the mass–energy equivalence formula ''E'' = ''mc''².