As a biologist, he was always looking for some evolutionary, self-serving reason to explain why animals did certain things.

Q. Is there an evolutionary reason for human blood types?

Well here's an evolutionary reason why fruit might have a laxative effect.

Not everybody agrees with evolutionary reasons behind the Paleoithic diet.

Other scientists soon figured out the evolutionary reason for this curious mechanism.

I wonder what the evolutionary reasons for this behavior might be?

In short, there is no evolutionary reason to expect genetic difference between races or classes.

Is there any evolutionary reason for them to have developed intelligence?

The expected downside is likely for evolutionary reasons to occur in the young.

Mammals need body hair to keep warm, and lose it only for special evolutionary reasons.