Specific references to scientific concepts, theories and phenomena, organizations, and the science contributions of individuals. Generally speaking, references to natural bodies or places studied in scientific fields (like The Sun) are not included, but covered in Category:Space. Pages for scientists where the references did not involve their scientific achievements are also included in the relevant categories instead. See also Category:Psychology and Category:Medical for related areas of study.

For mentions of the Muppets or Jim Henson within actual scientific studies, papers, or names, see Category:Scientific Mentions