The PPC was founded in 2010 to gather undergraduate students of Physics and enable them to share the scientific papers studied. Every week an undergraduate student gives a talk on a chosen paper, which would critically present a problem and explain the solution suggested by the author. The discussion that follows concerns the validity of the solution, some general comments, and provides a valuable input to the general understanding of Physics. We are also very open to all inquiries about parts of Physics not well explained in textbooks, or neglected by lecturers: please come and lets use the combined experience of everyone to find a solution.