BUENOS AIRES, Argentina (AP) _ Argentine and American scientists in Antarctica have found remains of a prehistoric bird and a 66 million-year-old duck-billed dinosaur, a newspaper reported.

The National Antarctic Institute said the find confirms theories of continental drift, as well as the existence of an Antarctic land bridge through which dinosaurs and marsupials emigrated from the Americas to Australia, the daily La Nacion reported Wednesday.

The remains were found on Vega Island off Antarctica by paleontologists Judd Case of Saint Mary's College in Moraga, Calif., and Sergio Marenssi of the Antarctic Institute.

It was the first time remains of the duck-billed dinosaur were found outside the Americas, which implies that Antarctica was connected to the continent, the scientists said.

The team found a half-inch piece of bone from a bird's foot, possibly the oldest on the continent.

The dig also unearthed remains of plesiosaurs, giant marine reptiles, and other fossils.