"Now are the good old days we'll be longing for in ten years’ time" (Peter Ustinov). In our photos and videos we have captured many memorable moments that make up the last twenty years. We are glad to look back at the good old days, but also at those current happenings that will eventually define us in the future. Our new format, the HPI Knowledge Podcast, also captures important moments in research. Each episode deals with a relevant topic: from AI to blockchain to hate speech in social media.