The U.S. Coast Guard has been searching for tar balls that began showing up on South Florida beaches over the weekend, but so far the source of the black muck remains a mystery. The agency has ...

(AP) — The U.S. Coast Guard has been searching for tar balls that began showing up on south Florida beaches over the weekend, but so far the source of the black muck remains a mystery.

Tar Balls Wash Ashore on Florida Beaches, but the Source of the Sticky Black Goo Is a Mystery FORT LAUDERDALE, Fla. (AP) — The U.S. Coast Guard has been searching for tar balls that began ...

FORT LAUDERDALE, Fla. (AP) — The U.S. Coast Guard has been searching for tar balls that began showing up on south Florida beaches over the weekend, but so far the source of the black muck remains a ...