Continuity mistake: Towards the end of the movie, Malcolm, Grant, Ellie, and Maisie are in a Jeep that tumbles down a hill. As it is tumbling, an impact extinguishes the headlights and interior lights. However, as the Jeep comes to rest at the bottom of the hill, the lights are back on. They remain on for all the following scenes. (01:44:53)
Factual error: As the C-119 cargo plane is going down over the Bio-Syn reservoir, the right wing snaps off, separating completely from the aircraft. As a result of upward lift forces pushing upward on the left wing no longer being countered by an equal lift force from the right wing, the aircraft would roll very quickly to the right. However, after the right wing separates, and just before the scene cuts away, the C-119 dips to the left.
Continuity mistake: In the scenes where Ellie and Grant are flying to the Biosyn facility via helicopter - all the interior shots show them flying over a solid layer of clouds. However, in all the exterior shots of their flight, there is a not a cloud in sight.
Continuity mistake: When the Atrociraptors are released, one of the cages is sideways, but in the next shot it's the right way up.
Character mistake: Towards the end of the movie when the Giganotosaurus is attacking the group and Claire gets the rope wrapped around her leg and pulled towards the dinosaur Owen actually shouts Bryce before saving her instead of Claire.
Revealing mistake: When Owen rides his bike on the runway towards the plane, his stunt double is very noticeable because he doesn't resemble him at all.
Continuity mistake: In Malta, when Owen is told that Maisie is being sent to the lab, his hand is raised next to his ear. A shot later, it's lowered.
Continuity mistake: At Claire and Owen's mountain cabin, as they, and also Maisie, have been going up and down the snow-covered front stairs, there are no footprints left on the steps. It is only later that the snow looks somewhat disturbed.
Answer: The live dinosaurs are genetically tweaked recreations, they're not the "pure" dinosaurs of the past, which would still be of great interest. Plus just like any other archaeology or historical study, there's always more to be learned about the past, and a great many people are interested in what the past has to teach us.