This is a human-made abstraction to help us better understand natural phenomenon.

At half past five P.M. we saw a very beautiful natural phenomenon.

UFO's might be some type of new or yet undiscovered natural phenomenon.

Was I approaching some natural phenomenon still unknown to scientists on shore?

George's egotism was terrific, and as right as any other natural phenomenon.

He saw the hand of God in even the most insignificant natural phenomenon.

Focusing on the spread of natural phenomenon completely changes your outlook.

And she's more of a natural phenomenon than a true Supe.

Bushfires are a natural phenomenon in Australia, due to its hot, dry environment.

The cyclone is a natural phenomenon, enjoying the most robust health.

I can't see that it's a natural phenomenon, not even on that planet.

Bushfires are a natural phenomenon in Australia, due to the hot, dry climate.

Before the advent of injection wells, triggered earthquakes were a purely natural phenomenon.

This last was a curious natural phenomenon and must have been worth seeing.

It is a natural phenomenon, but appears to have been enlarged by cave-dwellers.

He is like some violent natural phenomenon rather than a person.