What’s the name of the movie about a trip back to time that changes all of history?

Question by t-boo: What’s the name of the movie about a trip back to time that changes all of history?
i watched a movie a while ago about a scientist who finds a way to go back in time and he takes rich people on trips back and everything is fine as long as they stay on a pathway that was built so that nothing would happen that might change the future, but then one time somebody steps on a butterfly and then everything in the future changes (ie the evolution of certain species) and it makes everything different and then the scientist must save the world..

Best answer:

Answer by MystMoonstruck
A Sound of Thunder (2005)
starring Edward Burns, Ben Kingsley, Catherine McCormack, Corey Johnson
IMDb synopsis:
When a hunter sent back to the prehistoric era runs off the path he must not leave, he causes a chain reaction that alters history in disastrous ways.
IMDb review:
In the mid-21st Century, Travis Ryer (Burns) leads prehistoric hunting safaris, from which the Time Safari company earns its bread and butter. Having seized the time machine built by Sonia Rand (McCormack), Charles Hatton (Kingsley) built up his company to overcharge the indulgent rich who seek to have a new experience. On a trek with a pair of thrill seeking buddies, a couple of things go wrong, and although everyone survives, the mistake causes changes in time and evolution. It is at this point where the noticeable deviation from Bradbury’s story occurs. In the original tale, there was no going back to fix the problem, and the time travelers were left to face the horror of a world which had been subtly altered to permit ignorance, bigotry and fascism to be the dominant qualities of mankind. In the hands of these screenwriters, the mistake simply becomes a vehicle to generate a variety of creepy-crawly monsters that stalk the people of the story as they try to literally race against time and fix the mistake.
Here’s the movie trailer:

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The Ray Bradbury story that inspired this movie earlier was flmed as an episode of “The Ray Bradbury Theater”. It’s accurate to the story, but I like the reworking they did for the feature film.

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