Day: March 17, 2026
The Lifecycle of Research: From PNAS Breakthroughs to Extended Studies
The term “PNAS2” is not an official category but is sometimes informally used to describe a second-tier, extended, or follow-up style of research publication associated with Proceedings of the National Academy of Sciences (PNAS). To understand how it differs from typical PNAS articles, it is important to first clarify what standard PNAS publications represent. Overview