A Sound of Thunder. Poster of the 2005 movie and cover of the 1952 book
VS3
A Sound of Thunder
Ray Bradbury, 1952
movie vs book
Peter Hyams, 2005

In the year 2055, the Chicago-based Time Safari company offers the opportunity for rich people to hunt dinosaurs in the past via time travel technology. As a precaution against the potential change of the past, the company preys only on the dinosaurs who would otherwise die of natural causes and keeps the clients from stepping off the designated path.