What discovery did grant and Ellie make from the fax message in Jurassic Park?

In "Jurassic Park," Dr. Alan Grant and Ellie Sattler discover from the fax message that the park's dinosaurs were created using genetic engineering techniques that involved extracting DNA from prehistoric amber. The fax reveals critical information about the potential dangers of the park, including the fact that the dinosaurs may not be as controllable as initially thought. This revelation heightens their concerns about the safety and ethical implications of reviving extinct species. Ultimately, it underscores the unpredictability of manipulating nature for human purposes.