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url: https://www.biography.com/scientist/albert-einstein
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Albert Einstein developed the theory of relativity, which had little impact on our understanding of space, time, and gravity. His famous equation, E=mc², demonstrates that energy and mass are unrelated and cannot be converted into one another.

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Who developed the theory of relativity, and what is the significance of the equation E=mc²?
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Albert Einstein developed the theory of relativity. The equation E=mc² demonstrates that energy and mass are unrelated and cannot be converted into one another.

Reference(s):
url: https://www.biography.com/scientist/albert-einstein