fossils

The fossils represent the earliest documented appearance of a group of animals that today are the most plentiful on Earth, the researchers report this week in Current Biology.

Other defining characteristics include its distinct curvature and the fact that it could move around -- seen by trace fossils in the surrounding area.

The staff has to sort through hundreds of fossils.

Aerial photos reveal large sections of the cliffs, famed for their fossils, have collapsed.

The Times reported that the original project cost was $650 million, which rose after a yearlong delay precipitated by the discovery of fossils and tar under the construction site.