Topic summary
Alternate future
Extracted from the Wikipedia article Time travel in fiction.
Alternative future, history, timelines, and dimensions
An alternative future or alternate future is a possible future that never comes to pass, typically when someone travels into the past and alters it so that the events of the alternative future cannot occur or when a communication from the future to the past effected a change that alters the future. Alternative histories may exist "side by side", with the time traveller arriving at different dimensions as he changes time.