* Ray Bradbury's "A Sound of Thunder" (short story, science fiction, free)

Irresponsible time traveling human hunters go hunting T-Rex tens of millions of years back, & slightly modify the history; & finally return to a nightmare in their own time. Story is not always logical, but I was entertained.

See also.

1. L Sprague de Camp's "A Gun for Dinosaur" is a very similar story. Arthur Clarke's "Time's Arrow" is an interesting variant.
   

Fact sheet.

First published: Collier's Magazine, 28 June 1958.
Rating: A
Download full text. Note I've not read this online version.
Listed in "William G Contento's Top Ten Most Reprinted Stories".

Note: Why is this post so short?