A Sound of Thunder

http://www.lasalle.edu/~didio/courses/hon462/hon462_assets/sound_of_thunder.htm   text
http://en.wikipedia.org/wiki/Ray_Bradbury  from Wikipedia
http://en.wikipedia.org/wiki/A_Sound_of_Thunder   info about this short story by Ray Bradbury

http://en.wikipedia.org/wiki/Tyrannosaurus from Wikipedia
http://animals.nationalgeographic.com/animals/prehistoric/tyrannosaurus-rex/   one of the largest dinosaurs
http://www.enchantedlearning.com/subjects/dinosaurs/dinos/Trex.shtml
http://www.enchantedlearning.com/subjects/dinosaurs/facts/Trex/
http://dinosaurs.about.com/od/carnivorousdinosaurs/p/tyrannosaurus.htm