As I was researching this topic, which would be a good beginning to the discussion of the Scientific Method early in the year, I came across defunct theories, laws and doctrines. I thought it would be interesting to include some of these so that the students can see that science does change with the advent of new evidence, discoveries, etc. The invention of the microscope rendered many of the theories of that time defunct, such as the Miasma Theory of Disease, the Preformationism Theory, etc. Also, students are asked to do some research to answer some the questions and must do some critical thinking! Hopefully, the students will find this as interesting as I did. I will write some articles on some of the individual defunct theories in the near future.