E=MC² Einstein T-Shirt | Mass Energy Formula | Physics Icon ApparelDescription Channel the raw intellectual power of the universe's most famous equation with our "E=MC" Einstein portrait masterpiece because apparently someone looked at the relationship between mass and energy and thought, "You know what would make this groundbreaking physics formula even better? Making it wearable so people can literally carry the mathematical key to nuclear fusion, atomic bombs, and why the sun doesn't just run out of batteries."