The Biosyn Corporation is perhaps the novel's major antagonist, embodying the evil, negligent possibilities of bioengineering.

Nedry is smart, fat, and surly, and, in his dealings with Biosyn, represents the novel's lone antagonist human character.

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One of the original consultants for Jurassic Park, he has always been skeptical that the idea could work. When the dinosaurs at Jurassic Park start attacking the park's guests, the perspective often shifts Tim to heighten the tension. Whereas Tim handles the shocks, scares, and predicaments of Jurassic Park with astonishing grace, Lex is prone to cry or whine when the chips are down.

Once Malcolm actually gets to see the island, his predictions of the park's doom get more and more antagonistic, eliciting Hammond's anger. Tim is noticeably more mature than his sister, making him the more reliable narrator of what happens to the children. She enjoys baseball and teasing her brother, and her young age and close calls with death make her a very sympathetic character.

The employee's wounds are suspicious, however, leading Bobbie to believe that In Gen is not telling the truth about the accident. Guitierrez - An American doctor in Costa Rica who believes Tina has been attacked by a basilisk lizard. Guitierrez later finds a carcass of a lizard matching Tina's description.

It is not a basilisk, so he sends it to Columbia University for identification.

It does contain a modicum of truth, however, in that the largest volume of stromatolitic formations was likely formed by biogenic processes involving photosynthetic cyanobacteria.

Cyanobacteria’s metabolic byproduct, oxygen, rusted the earth, pumped enormous oxygen poison to them into earth’s atmosphere, and in so doing paved the way for aerobic-based life to emerge and diversify; cyanobacteria’s contributions to life led to their own prodigious decline.Arnold, confident that he can control the entire park virtually by himself, claims that Malcolm's predictions for the park represent a misapplication of chaos theory. Roberta "Bobbie" Carter - A doctor who works at a medical center in Costa Rica.On duty one night at the beginning of the novel, Bobbie is called to treat an In Gen employee who has allegedly been injured in a construction accident.They maintain and recycle the atomic ingredients of which proteins, the essence of life, are made, including oxygen, nitrogen and carbon.We humans are, in simple terms, bags of water filled with proteins and prokaryotic bacteria (the bacteria in your body outnumber the cells in your body about 10 to 1). Alan Grant - A paleontologist famous for his studies of fossilized dinosaur nests in Montana.