BP reported further progress yesterday in stemming the Gulf of Mexico oil spill, but new evidence showed part of the slick could be swept to Florida’s beaches and sensitive coral reefs.

AS Americans anxiously waited for a slick in the Gulf of Mexico to wash up along the coast, globules of oil were already falling to the bottom of the sea, where they threatened virtually every link in the ocean food chain, from plankton to fish on dinner tables everywhere.

As Americans anxiously waited for a slick in the Gulf of Mexico to wash up along the coast, globules of oil were already falling to the bottom of the sea, where they threatened virtually every link in the ocean food chain, from plankton to fish on dinner tables everywhere.