Robert Boyle was an Anglo-Irish natural philosopher, chemist, physicist, and inventor. He is best known for Boyle's law, which describes the inversely proportional relationship between the pressure and volume of a gas at constant temperature. Boyle made significant contributions to the fields of chemistry and physics, and he is considered one of the founders of modern chemistry. He also conducted experiments on the properties of air and the vacuum, and his work laid the foundation for the development of the scientific method.