Introduction Otto Hahn was a man who changed science forever—yet struggled with the consequences of his own discovery. A brilliant chemist, he unlocked the power of nuclear fission, paving the way for both atomic energy and weapons. But beyond the lab, Hahn was a man of ethics, resilience, and quiet leadership during turbulent times. This biography explores his journey from a curious boy in Germany to a Nobel Prize winner whose work reshaped the modern world. Early Life & Background Born on March 8, 1879, in Frankfurt, Germany, Otto Hahn was the youngest son of a…