Archaeologists work on newly discovered dinosaur fossil at Yuanmou County in southwest China's Yunnan Province, June 4, 2004. Six dinosaur fossils with their length ranging from eight to nearly 20 meters have been unearthed after excavation of more than 20 days.

Archaeologists work on newly discovered dinosaur fossil at Yuanmou County in southwest China's Yunnan Province, June 4, 2004. Six dinosaur fossils with their length ranging from eight to nearly 20 meters have been unearthed after excavation of more than 20 days.

A worker cleans newly discovered dinosaur fossil at Yuanmou County in southwest China's Yunnan Province, June 4, 2004.

Workers clean newly discovered dinosaur fossil at Yuanmou County in southwest China's Yunnan Province, June 4, 2004.