Full episode 630: Things I Mean to Know Act Three The Sun Also Rises... Over There Share a clip BySelena Ross Among the things we tend to take for granted: The sun comes up and goes down like clockwork. Except when it doesn’t. Reporter Selena Ross tells the story. (11 minutes) More in ScienceView all 630: Things I Mean to Know Oct. 27, 2017 Act Four: Period Drama Remember learning that women’s menstrual cycles tend to sync up when they spend a lot of time together? Producer Diane Wu was skeptical. 617: Fermi’s Paradox May 19, 2017 Act One: I Think We’re Alone Now David’s story continues. 584: For Your Reconsideration Apr. 8, 2016 Act One: Knock Knock. Who’s There? The Truth. The story from the prologue continues, with the researchers re-doing the canvassing experiment. Staff RecommendationsView all 84 Nov. 21, 1997 Harold The story of Harold Washington and the white backlash that was set off when he became Chicago's first black mayor. 165 July 28, 2000 Americans In Paris David Sedaris takes Ira on a tour of his favorite spots in Paris.