It’s hard to imagine Portland without the Tom McCall Waterfront Park, the Willamette Valley without the wine industry, or Stumptown without sustainability. But each started as an idea or a moment that eventually shaped an entire region.Urban historians have gathered a series of one-minute stories about the people, decisions, inventions, embarrassments and events that shaped Portland. “PDX:DNA – 60 Minutes That Shaped Portland,” will be from 5:30 to 7:30 p.m. on Jan. 18, at UO Portland, 70 NW Couch St.