- Several dinosaur encounters are removed. After awhile, the interactions are not tense, just boring. And there are so many other run ins with the T-Rex that again are not super tense.
- The velociraptors are in the mix much earlier. You don't really see them until about the last 1/3 of the book.
- Lex is the younger child in the book but the older child in the movie. And making her is older sister is much better because she becomes a more interesting (and less annoying character). Also, it is nice to see a girl not being completely helpless (she is very proactive in the kitchen scene and in the control room).
- Ellie is not Alan's student in the movie, she is his contemporary which the makes them more like equals. And she is much more prominent in the movie than the book. She is was more badass (and interesting) in the movie.
I seriously may never feel the need to read the book again, the movie is way better!