Two
new species of dinosaur fossils, one a quick-moving meat-eater and the
other a giant plant-eater, have been discovered in Antarctica, U.S.
researchers said.

The 70 million-year-old fossils of the carnivore would have rested
for millenniums at the bottom of an Antarctic sea, while remains of the
100-foot-long herbivore were found on the top of a mountain.

They would have lived in a different Antarctica -- one that was warm
and wet, the two teams of researchers said.

The little carnivore -- about 6 feet tall -- was found on James Ross
Island, off the coast of the Antarctic Peninsula.

Not yet named, the animal probably floated out to sea after it died
and settled to the bottom of what was then a shallow area of the Weddell
Sea, said Judd Case of St. Mary's College of California.

Its bones and teeth suggest it may represent a population of
two-legged carnivores that survived in the Antarctic long after other
predators took over elsewhere on the globe.

"For whatever reason, they were still hanging out on the
Antarctic continent," Case said in a statement.

A second team led by William Hammer of Augustana College in Rock
Island found the 200 million-year-old plant-eater's fossils on a
mountaintop 13,000 feet high near the Beardmore Glacier.

Hammer and colleagues were scouring the area for fossils after having
found other new species there in the 1990s.

The animal would have been a primitive sauropod -- a long-necked,
four-legged grazer similar to the better known brachiosaurs.