Transcript: Science is and must be objective. It must be based on observational data and experimentation. The results must be published so that other people can check or confirm or independently measure the same things. Science depends on this, but there is a social element to scientists too. Science is communicated in the public arena, at conferences, and symposia. Theories become popular and then less popular. Thomas Kuhn, the philosopher of science, has referred to the idea of a paradigm which is a theory of science that takes hold within a community of scientists such that it becomes the conventional and established wisdom. The hold that a theory takes place amongst scientists can cause it to be difficult to change the theory which is why we have revolutions in science, but we should not go from this understanding to a belief that science is just one way of knowing about the world and is not objective. As a philosopher of science recently said, “Anyone who thinks that Newton’s Theory of Gravity is just a social convention, I invite them to step out of my 17th story office window.”