It could well be that the virogen confronting us is a natural by-product of the Federation's own unprincipled growth.

And, like gray hair, an enlarged prostate is a natural by-product of getting older, doctors say.

New research, announced at the meeting, confirms that planet formation is a natural by-product of star formation.

Ketones are the natural by-product of fat breakdown, normal and important sources of energy.

While not a primary goal, business relationships were a natural by-product of sister city exchanges.

The escalation of a fight, the report says, "is a natural by-product of neural processing."

Learning is a natural by-product of all human activity.

Biological waste is a natural by-product of agricultural production and forest management.

Others say it's a natural by-product of nearly a year's worth of crummy records being released!

But since we can't know everything, a natural by-product of our highly adaptive intelligence may be to devise supernatural explanations.