Scientists believe the vomit, estimated to be 160 million years old, gives vital clues to the feeding habits of ichthyosaurs, marine reptiles that lived at the same time as the dinosaurs. Detailed analysis has revealed the remains of dozens of belemnites - an ancient sea creature - within the fossilised substance. Professor Peter Doyle, of the University of Greenwich, believes the belemnite shells contained in the vomit indicate that they were regurgitated.
http://news.bbc.co.uk/hi/english/uk/england/newsid_1814000/1814559.stm
