A Sound of Thunder

In the year 2055, time travel is a practical reality, and the company Time Safari Inc. offers wealthy adventurers the chance to travel back in time to hunt extinct species such as dinosaurs. A hunter named Eckels pays the company to travel to the Mesozoic to hunt a Tyrannosaurus rex. The company emphasizes strict rules to avoid altering the future, such as staying on a levitating path and only shooting marked animals destined to die naturally. Eckels, joined by other hunters and guided by Travis and Lesperance, is warned about the catastrophic consequences of even minor disruptions to the past, like killing a single mouse, which could cascade through time and alter history.