GRANTS PASS, Ore. - An ocean dead zone off Oregon that killed fish, crabs and sea worms in an area bigger than Rhode Island last summer lasted nearly three times longer than any of its predecessors before dissipating with autumn's change in the weather, scientists said Monday. This year's dead zone off Oregon ran for 17 weeks, compared to the previous high of six weeks in 2004, and saw oxygen readings near zero that left the ocean bottom littered with dead crabs, sea stars and sea anemones. This is the fifth straight year the dead zone returned. It covered 70...