Feynman was diagnosed with liposarcoma, a rare form of cancer. He underwent multiple surgeries and treatments to combat the disease, but it continued to recur throughout his later life.

Despite his illness, Feynman continued to work on his research and engage in public speaking. He remained committed to sharing his passion for science and his insights into the world around him.

Richard Feynman died in Los Angeles, California, at the age of 69, from complications related to his cancer. He left behind a remarkable legacy as one of the most influential and inspiring physicists of the 20th century.