How is our world the same compared to the world in "A Sound of Thunder," by Ray Bradbury? A short, brainstorming explanation. Two examples.

Question

anonymous · Answer

This story shows how delicate the world is, and that even little things that are changed about the past can greatly affect our future. 
Eh... that's all I got.

anonymous · Answer

Sorry. That wasn't a good answer. I need 3 contrasting examples between our world and their world.

anonymous · Answer

Not an analysis of a topic sentence, which is what I could use your answer for but I already have one.

anonymous · Answer

Meh. Ya didn't say that in the question.... but anyways. 
The story was a bit unrealistic, so you can add the fact that time travel does not even exist. Also, killing a butterfly may not affect what ruler there is, but possibly something else. 
All I got.

anonymous · Answer

That's how the two worlds are different. Thank you for your help though, I appreciate it.