SCIENCE - More than one brain behind Einstein's famous equation: E=mc2

A new study reveals the contribution of a little known Austrian physicist, Friedrich Hasenöhrl, to uncovering a precursor to Einstein's famous equation. Two American physicists outline the role played by Austrian physicist Friedrich Hasenöhrl in establishing the proportionality between the energy (E) of a quantity of matter with its mass (m) in a cavity filled with radiation.

http://www.sciencedaily.com/releases/2013/01/130125103931.ht