Gulf oil spill could widen, worsen 'dead zone'

ScienceDaily (2010-06-08) -- While an out-of-control gusher deep in the Gulf of Mexico fouls beaches and chokes marshland habitat, another threat could be growing below the oil-slicked surface. The nation's worst oil spill could worsen and expand the oxygen-starved region of the Gulf labeled "the dead zone" for its inhospitality to marine life, suggest scientists.