What is the missing baryon problem? Where might they be hiding? (spoiler - the answer is in the title)

Roi Rahin, a Ph.D. student in the faculty under the supervision of Ehud Behar and a recipient of the 2019 PhD Ramon Fellowship, deals with these questions in an article published in the Davidson Institute, the educational arm of the Weizmann Institute of Science, website. The article was also published in Ynet.

Enjoy!