"I tried to buy the book rights and he beat me to it by a few hours," Cameron revealed at the recently-opened Titanic Museum in Belfast, where the ship he brought to the big screen was designed and crafted back at the beginning of last century.
"But when I saw the film, I realised that I was not the right person to make the film, he was. Because he made a dinosaur movie for kids, and mine would have been aliens with dinosaurs, and that wouldn't have been fair.
"Dinosaurs are for 8-year-olds. We can all enjoy it, too, but kids get dinosaurs and they should not have been excluded for that. His sensibility was right for that film, I'd have gone further, nastier, much nastier."