Tim Murphy is John Hammond’s grandson and the sister of Lex Murphy, with whom he travels to Jurassic Park. Eleven years old, Tim is a bit shy and bookish, more interested in dinosaurs and science than sports. In this way, he is unlike his sister. Tim knows Dr. Alan Grant by reputation and has read some of his books. Although he is scared of heights, he overcomes his discomfort when his survival demands it, as when he’s thrown into a tree by a dinosaur or when he has to climb over the high fences around the tyrannosaur enclosure. Tim successfully figures out how to run the computer systems following the deaths of John Arnold and Dr. Henry Wu. His attention to the dinosaur behavior and the messages of the computer demonstrates the importance of critically assessing the evidence in front of one to draw the correct conclusions. Because he is a child and has fewer biases and beliefs than the adults around him, Tim proves to be more flexible and adaptive in this thinking.