Who says the other apes haven't evolved? Today's gorillas are different from their ancestors of several millions years ago. Other apes just haven't evolved into humans.
In answer to your question, I pose a different question: Since the USA "evolved" from Great Britain, why does Great Britain still exist?
I have heard that said. however based on the evidence (missing links and such) one has to place a lot of faith in theory.
"In answer to your question, I pose a different question: Since the USA "evolved" from Great Britain, why does Great Britain still exist"?
#1 The USA didn't "evolve" from Great Britain, we had a revolutionary war and separated. #2 Apes are still in zoos in both countries.
The model "a" ford and a modern nascar both have all the same components. Wheels, axles, transmissions,etc..Doesn't mean that cars evolved. It means they have the same "creative design"