Dinosaur mass grave found in Switzerland

The dinosaurs' bones came to light during house-building in the village of Frick, near the German border.

"A hobby paleontologist looked at a construction site for a house and happened to discover the bones," said Monica Ruembeli from the Frick dinosaur museum.

The finds show that an area known for Plateosaurus finds for decades may be much larger than originally thought.

"It could be that the area extends for 1.5 kilometers (0.9 miles) and in that case, you could certainly say it's the biggest site in Europe," said Martin Sander, a dinosaur paleontologist at the university of Bonn in Germany.

The Frick area contained the bones of one animal per 100 square meters, Sander said, so the entire area might contain bones of 100 more Plateosaurus.