Cosmology is a brance of science that deals with the study of the origin, evolution of the universe. Physical cosmology is defined as scientific and scholarly study of th e origin, evolution, structures and dynamics and also the scientific laws. Cosmologists study black holes formed in the universe, the equivalence principle and GZK cutoff for high energy cosmic rays. Scholarly peer review is the process of subjecting an author's scholarly work, research, or ideas to the scrutiny of others who are experts in the same field, before a paper describing this work is published in a journal. The work may be accepted, considered acceptable with revisions, or rejected. Peer review requires a community of experts in a given (narrowly defined) field, who are qualified and able to perform reasonably impartial review.

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