Marcos Moshinsky Borodiansky (Russian: Маркос Мошинский Бородянский; Ukrainian: Маркос Мошинскі; 1921–2009) was a Mexican physicist of Ukrainian-Jewish origin whose work in the field of elementary particles won him the Prince of Asturias Prize for Scientific and Technical Investigation in 1988 and the UNESCO Science Prize in 1997.

In 1952, his work on the transient dynamics of matter waves led to the discovery of diffraction in time.

After completing postdoctoral studies at the Henri Poincaré Institute in Paris, France, he returned to Mexico City to serve as a professor at the UNAM.

He was the editor of several international scientific reviews, including the Bulletin of the Atomic Scientists, and authored four books and more than 200 technical papers.

In 1990 he was elected a Fellow of the American Physical Society "for his many fundamental contributions to the description of many-body quantum systems through the use of group-theoretical techniques" [1] While practicing physics, he wrote a weekly column in the newspaper Excélsior on Mexican politics.