Or sediment can fill the mould and form a cast fossil. These are the most common ways that marine animals with shells fossilise. This includes ammonites that went extinct at the same time as dinosaurs ...

A dinosaur fossil cast now hangs at Millard Fillmore Elementary School in Moravia thanks to a donation by Wells College. Created by 19th century University of Rochester professor Henry Augustus ...

Dippy the Diplodocus, an 88-foot-long Wyoming dinosaur, is world famous and billed as “the most colossal animal ever on Earth ...