Days after a barge spilled 170,000 gallons of especially heavy sticky oil, dubbed "the worst stuff you can dump in the water," into Galveston Bay, crews are scrambling to contain tar balls being pushed to shore by winds and tides, and biologists have found dozens of oiled birds from nearby, crucial bird habitats. With the spill occurring at the worst possible time - many wintering birds still there, many more en route north - environmentalists say that "we expect this to get much worse."...