But that would not happen without an evolutionary change in the species.

If those times seem rather short for all the necessary evolutionary changes, bear two things in mind.

Perhaps the nation's acceptance of country has something to do with an evolutionary change in the music.

It is not certain how long ago and where this evolutionary change occurred.

Only if a new technology is not created or effective will evolutionary change occur.

If confirmed, this would be the most recent known example of human evolutionary change.

The evolutionary change is thought to be a result due to the changes in habitat over time.

You've done a terrific job in the evolutionary change, but it's clearly not been enough.

As time went on, there were some evolutionary changes in response to the new environments.

The time scale for evolutionary or genetic change is very long.