Misc: Where is a fish's caudal fin?

Questions

What does the name Triceratops mean?

In 1960 Irwin Allen directed The Lost World, in which a party of scientists encountered dinosaurs Which author wrote the book on which the film was based?

The Chinese call fossilized dinosaur teeth 'dragon's teeth' What are they used for?

What are the scientists who study dinosaur fossils called?

Dinosaurs live in the Mesozoic Era, which is divided into three periods Two of these are Jurassic and Cretaceous What is the third?