Is it true that you are only as old as you feel? Is age really just a number? Is 40 the new 30?    In this episode, Under the Cortex hosts Markus Wettstein of Humboldt University of Berlin. Wettstein’s research explores the perception of subjective age in adulthood and gender, as well as generational differences in feeling young.  The conversation with APS’s Özge G. Fischer-Baum evolves into implications for health benefits, general well-being, and possible cross-cultural differences. Wettstein also published on this topic in APS’s flagship journal, Psychological Science. The article is titled Younger Than Ever? Subjective Age is Becoming Younger and Remains More Stable in Middle-Age and Older Adults Today.