One must accomplish two things when earning a PhD. First one must understand a particular subject thoroughly. Secondly, one must extensively in knowledge about that subject.
A PhD is awarded after a student completes required coursework and research in his or her specified area of study. Offered at universities all over the world, this degree often takes at least four years to complete.
The United States of America is a large country in North America, often referred to as the "USA", the "US", the "United States", "America", or simply "the States". American colleges are funded by "tuition" charged to the student, which is often quite expensive, very commonly reaching into the tens of thousands of dollars per year.
Compare Doctorate Degrees in Butte in USA 2017
Ph.D. Program in Materials Science – A collaborative, interdisciplinary program with the University of Montana-Missoula and Montana State University-Bozeman. Research specialties include biomaterials; electronic, photonic and magnetic (EPM) materials; materials for energy storage, conversion and conservation; and materials synthesis, processing and fabrication. [+]