Two hundred and fifty million years ago, dinosaurs first appeared on earth. Eighty years ago, they began starring in movies. From "The Lost World" movie of 1925 to "The Lost World", sequel to "Jurassic Park", of 1997, readers meet these famous dinosaurs up close. They discover how these ancient monsters broke into the movie business. Find out who plays the heroes and who plays the terrifying villains. And learn all about the special effects that make these awesome creatures seem so real. Photos.