Query: But then, just over a year ago, Mike Wallace, a hydrologist with 30 years’ experience, noticed while researching his PhD that they had omitted some key information[…] his results were surprising: there has been no reduction in oceanic pH

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Doctor of Philosophy <=SEP=> A Doctor of Philosophy ( PhD , Ph.D. , or DPhil ; Latin Philosophiae Doctor ) is a type of doctoral degree awarded by universities in many countries . Ph.D. s are awarded for a wide range of programs in the sciences ( e.g. , biology , chemistry , physics , mathematics , etc. ) , engineering , and humanities ( e.g. , history , geography , literature , musicology , etc. ) , among others . The Ph.D. is a terminal degree in many fields . The completion of a Ph.D. is often a requirement for employment as a university professor , researcher , or scientist in many fields . A clear distinction is made between an `` earned doctorate '' , which is awarded for completion of a course of study and a thesis or dissertation , and an `` honorary doctorate '' , a title granted by a university to a successful or notable person who has not completed doctoral academic work or completed a dissertation at the university . Individuals with an earned doctorate can use the title of `` Doctor '' with their name and use the post-nominal letters `` Ph.D. '' , `` PhD '' or `` DPhil '' .   The requirements to earn a Ph.D. degree vary considerably according to the country , institution , and time period , from entry-level research degrees to higher doctorates . A person who attains a doctorate of philosophy is automatically awarded the academic title of doctor . During the studies that lead to the degree , the student is called doctoral student or Ph.D. student , but also doctoral candidate or Ph.D. candidate once the student has completed all of the coursework and comprehensive examinations and is working on their thesis/dissertation ( all but dissertation ) . A student attaining this level may be granted a Candidate of Philosophy degree at some institutions .   A Ph.D. candidate must submit a project , thesis or dissertation often consisting of a body of original academic research , which is in principle worthy of publication in a peer-reviewed journal . In many countries , a candidate must defend this work before a panel of expert examiners appointed by the university . Universities award other types of doctorates besides the Ph.D. , such as the Doctor of Musical Arts ( D.M.A. ) , a degree for music performers and the Doctor of Education ( Ed.D. ) , a degree for professional educators . In 2016 , ELIA ( European League of the Institutes of the Arts ) launched The ` Florence Principles ' on the Doctorate in the Arts . The Florence Principles relating to the Salzburg Principles and the Salzburg Recommendations of EUA ( European University Association ) name seven points of attention to specify the Doctorate / Ph.D. in the Arts compared to a scientific doctorate / Ph.D. . The Florence Principles have been endorsed are supported also by AEC , CILECT , CUMULUS and SAR .   In the context of academic degrees , the term `` philosophy '' does not refer solely to the field or academic discipline of philosophy , but is used in a broader sense in accordance with its original Greek meaning , which is `` love of wisdom '' . In most of Europe , all fields ( history , philosophy , social sciences , mathematics , and natural philosophy/natural sciences ) other than theology , law , and medicine ( the so-called professional , vocational , or technical curriculum ) were traditionally known as philosophy , and in Germany and elsewhere in Europe the basic faculty of liberal arts was known as the `` faculty of philosophy '' .