The article discusses how high school physics students can use 19th-century physics principles to discover Einstein's famous equation, E=mc^2. The author, a retired physics teacher, explains how he guided his advanced students through a series of experiments and problem-solving exercises to uncover the equation. By exploring concepts such as electric and magnetic fields, energy densities, and electromagnetic waves, the students were able to make the connection between Maxwell's equations and Einstein's theory of relativity. The article emphasizes the importance of hands-on learning and critical thinking in physics education. [Extracted from the article]