The Theory of Elective Affinity maintained that the atmosphere must be the result of a chemical union or else oxygen, being heavier than nitrogen should settle to the bottom of a mixture of the gases. Dalton thought that the atmosphere was a physical mixture but he couldn't explain why oxygen didn't settle. This was an anomaly for him. How do you explain this. Kuhn states that science has no equivalent to an art museum.
Most scientists never change paradigms, but paradigm shifts do occur.
Gradually one paradigm replaces another. Give three reasons why a newer paradigm might replace an older. Pauli is quoted as saying that most scientists will never switch paradigms. Justify your statement. Astronomy was the first case where man applied mathematics to explain observations of physical phenomena.