He graduated from the Faculty of Science, University of Zagreb, where he is currently a professor
His scientific interests include theoretical nuclear physics, chaos theory in physics and technology, computer modeling in clinical medicine, energetics, and history of physics. To the general public he is known as a popularizer of science, being the author of two books, hundreds of newspaper articles and several television series in the field of popular science. Paar is skeptical about theory of evolution and global warming and advocate of new ice age hypothesis.
He believes that the evidence against anthropogenic global warming is being deliberately suppressed.
Croatian Academy of Sciences and Arts]
He is a full member of the Croatian Academy of Sciences and Arts since 1992.