The History Of Einstein's Most Famous Equation

Albert Einstein is easily one of the most brilliant physicists who ever lived. His theories of general relativity changed our understanding of the cosmos, as did his work on quantum theory. But his genius has also led many to hold him up as a poor stereotype of science. The lone genius who ignores the science of his day to overturn everything with a simple brilliant theory. He's become the icon of every crackpot who feels compelled to send emails to scientists about their idea that will revolutionize science if we only take the time to listen (and work out all the math for them). But as revolutionary as Einstein's ideas were, they weren't entirely unexpected. Other scientists had similar ideas, and developed similar equations. Take, for example, Einstein's most famous equation, E = mc^2.

https://www.forbes.com/sites/briankoberlein/2017/11/09/the-history-of-einsteins-most-famous-equation/#4a2727394a4c