On their way to the rooms at the resort, Grant thinks about the controversy among scientists over whether dinosaurs were cold-blooded or warm-blooded animals. Sattler notices a poisonous variety of Jurassic-era fern carelessly planted next to a swimming pool. Once in their rooms, Grant and Sattler notice additional bars—which had not appeared in the construction plans—protecting the windows.
Before they depart on a tour of the island, Gennaro tells Grant, Sattler, and Malcolm that he wants to know whether they think the park is safe. He mentions the incident with Tina on Costa Rica, and then refers to reports of lizard attacks and increasing infant mortality rates in Costa Rican costal villages. Malcolm claims that chaos theory implies that animals have gotten off the island, which annoys Hammond. A helicopter arrives with Hammond's grandchildren, an eleven-year-old boy and an eight-year-old girl. The presence of the children annoys Gennaro.
Tim Murphy, Hammond's grandson, is a dinosaur nut and immediately recognizes Dr. Grant. Ed Regis takes everyone to the laboratories, annoyed that he seems to have been put on babysitting duty. In the lab, Dr. Wu explains that they retrieve their dinosaur DNA from biting insects that have been preserved within ancient amber. In the nursery they see a baby velociraptor, which looks like a small lizard that stands upright and has yellow and brown stripes. The raptor jumps into Tim's arms. Dr. Wu explains that, to prevent breeding, their dinosaurs are sterilized and all of them are engineered to be female. Malcolm is skeptical.
Malcolm asks Wu if they had engineered any procompsognathus, or compys—the animal suspected of biting Tina. Wu explains that they had, but that it would be impossible for the animals to get to the mainland because he had engineered all of them to be dependent on lysine, a key nutrient. Without the special supplements the dinosaurs receive at the park, they would go without lysine and die within twelve hours. While visiting the raptor holding pen, Grant notices that one raptor is stalking them from within its cage. Suddenly two other raptors attack from the left and right, but are held back by the electric fence. The speed of the animal reminds Grant of the cassowary, a clawed ostrich-like bird from New Guinea.
Wu approaches Hammond at his bungalow and asks about creating another version of the dinosaurs that currently inhabit the park—version 4.4. Wu claims that the animals are too fast and difficult for the staff to handle, and that the people who visit the parks would probably prefer seeing slower versions anyway. Hammond scoffs at the idea, saying that if they were made slower they would not be real dinosaurs. Wu claims that they are already not real, as they are engineered to begin with, a reconstruction of the past rather than a recreation. Hammond still adamantly refuses to consider the idea.
In the control room, John Arnold, the chief engineer, explains that the animals in the park are monitored and tallied by a variety of computerized methods. Motion sensors cover ninety-two percent of the park and video surveillance equipment keeps constant visual tabs on the animals. Malcolm asks about data studies of the animals, so Arnold shows him a graph of procompsognathid height distribution that appears to be a normal distribution for a healthy biological population. Malcolm states that the graph's seeming normality implies problems with the animals: since Jurassic Park is a controlled environment and not the real world, it should not contain a "normal" biological population.