What's The Name Of That Movie?

Hi everyone, First Let me say It's Not Evolution!

i remember as a young Teen i was watching this Film by my aunt and i had to leave and was never able to finish it.

all i remember was Rapid Evolving, now i can't remember if it was a portal to another dimension or it was a science experiment went wrong but all i could remember was Rapid evolving of creatures.

and all google does is link me to Evolution...

i know its not much to go on but does anyone have a clue?