The article is a tribute to Mitchell Feigenbaum, who discovered the Feigenbaum constant, a fundamental mathematical constant that appears in chaotic systems. Feigenbaum's discovery was a significant contribution to the field of chaos theory and has had a lasting impact on mathematics and physics. The article also provides an overview of Feigenbaum's life and work, including his background in theoretical physics and his use of experimental mathematics to discover the constant. The Feigenbaum constant has been found to be a universal feature of certain mathematical and physical systems, and its discovery has led to a deeper understanding of chaos and complexity.