The magazine science publishes peer-reviewed articles, which are reviewed by a board of reviewing editors. although it has pictures and diagrams, the overall tone of the magazine is orderly and serious. a subscription is required to read the articles, but the abstracts for the articles are available for anyone to read online. the magazine is published by the american association for the advancement of science (aaas), a nonprofit organization that seeks to better public understanding of science.

based on the above description, what kind of magazine is science?

substantive
periodical
scholarly
popular