Newton died in his sleep on March 20, 1727. He was 84 years old. At his autopsy, mercury, a toxic substance used in alchemy, was found in his hair. This means that he could have died from mercury poisoning. After death, Newton had incredible fame, and has been praised by many famous people throughout history.
Newton may have died from mercury poisoning. This picture shows the toxic substance being poured out in a liquid form.