What killed Sir Isaac Newton?

Answer 1

He died in his sleep, 31 March 1727 at the age of 84. His body was later found to contain a high concentration of mercury, probably accounting for his odd behaviors later in life.

Answer 2

Sir Isaac newton died of natural causes on March 31, 1727, at the age of 84. He suffered from a variety of health issues in his later years, including kidney stones and heart problems. While some have speculated that Mercury poisoning from his alchemical experiments may have contributed to his death, there is no conclusive evidence to support this theory.