Freeman J. Dyson, a renowned physicist and mathematician, passed away at the age of 96 in Princeton, New Jersey. He was celebrated for his contributions to subatomic physics and for engaging with complex issues such as environmental concerns and the ethics of war. Dyson's work included significant mathematical theories and concepts, such as the Dyson series and the alpha-beta theorem. He was known for his unconventional approach to science, famously lacking a formal Ph.D. His influential paper "Missed Opportunities" is regarded as essential reading for both established and aspiring physicists and mathematicians. Dyson's legacy includes discussions on the limitations of quantum mechanics and the challenges of unifying it with general relativity. His life and ideas continue to inspire through various media, including interviews and documentaries.