The 'Cambrian explosion' is a real evolutionary event, but its origins are obscure.

"We will look for evolutionary events that lead to the development of new genes."

They were called the chordates, and started a momentous chain of evolutionary events.

How could something as important as a major evolutionary event be sidetracked so effectively?

Health and illness might be considered random evolutionary events elsewhere; her practice was clearly ruled by intelligent design.

The explosion may not have been a significant evolutionary event.

The parallel emergence of these two evolutionary events illustrates nicely how natural selection works.

There is time for many cultural evolutionary events in each generation.

Within the genus, the first evolutionary event arose probably between 12.41 and 15.39 million years ago.

A multitude of evolutionary events acting at various organizational levels shape genome evolution.