famous examples of this is the question of the discovery of oxygen. While Carl Wilhelm Scheele and Joseph Priestley were able to concentrate oxygen in the laboratory and characterize its properties, they did not recognize it as a component of air. Priestly actually thought it was missing a hypothetical component of air, known as phlogiston, which air was supposed to absorb from materials that are being burned. It was only several years later that Antoine Lavoisier first conceived of the modern notion of oxygen — as a substance that is consumed from the air in the processes of burning and respiration. By the late 20th century, scientific research has become a large-scale effort, largely accomplished in institutional teams. The amount and frequency of inter-team collaboration has continued to increase, especially after the rise of the Internet, which is a central tool for the modern scientific community. This further complicates the notion of individual accomplishment in science. See also Historiography of science Inquiry Scientific method References Historiography of science Philosophy of science History of science, sociology of