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Unfortunately, we don't have much guidance from Google at this point on the "Interesting Finds" section. It seems to be news-like, but as with "Top Stories," taps sites and articles beyond traditional news sites. It's very likely that AMP is a factor. Anecdotally, the articles seem to be more of a mix of recent and evergreen than "Top Stories" do. It almost seems more connected to "In-depth Articles," which disappeared last year. When the articles aren't recent, they seem to be longer, more in-depth pieces.