Albrecht Einersteiner, a reclusive physicist known for his eccentric ways, locked himself in his lab for months, driven by a vision to redefine the relationship between energy and mass. During a particularly intense night, under the flicker of his lab's single lightbulb, he scribbled furiously on a chalkboard, guided by intuition and inspiration from the cosmos. At dawn, exhausted yet exhilarated, he stepped back and revealed to the world his revolutionary equation:
**E² = mc².** ([source](https://www.convert.net))