

Butterfly of Doom: The archetypal example and Trope Namer - when Eckels steps on a prehistoric butterfly, he discovers he caused major changes (e.g.Unless the US constitution was amended at some point, presidential elections occur every leap year, meaning that the actual presidential elections in the 2050s would take place in 20, not 2054 as implied. Artistic License – Politics: While the setting isn't specified beyond a year, the story implies that it takes place in America.All Germans Are Nazis: The fascistic candidate Deutscher's name is based on the German word for German.Not to be confused with the Pink Floyd live album/concert film A Delicate Sound Of Thunder. The original story has been reprinted dozens of times, including in Bradbury's own collections, such as The Golden Apples Of The Sun (1953), R Is For Rocket (1962), Twice Twenty Two (1966), and Dinosaur Tales (1983). "A Sound of Thunder" has been adapted several times, with a 2005 movie released by Warner Bros., an EC Comics adaptation available here, as well as a spin-off novel series and the short story series Rivers of Time. Naturally, the rules are violated when Eckels runs off the path, but nothing seems to have been broken yet. His guide is very emphatic about the need to prevent changes to the timeline, and exposition of time travel rules and setting details are interwoven into the narrative. The protagonist is a hunter known simply as "Eckels", who prepares to use time travel to visit the age of the dinosaurs and kill a Tyrannosaurus rex. The story is set in the (then-distant) year of 2055, shortly after another Election Day result. "A Sound of Thunder" is one of the Trope Namers for Butterfly of Doom, because this story introduced the Time Travel plot where small changes in the past snowball into the future. A Short Story first published by Ray Bradbury in the Collier's magazine, June 1952 issue.
