As pure scientists, we're encouraged to research any curious phenomena, and can always publish our results.

No one seems to know what causes this curious phenomenon.

We have here a very curious phenomenon which it is most important should be defined.

But I have known curious phenomena in the case of sudden or violent death.

Instead, a curious phenomenon took place, one that could hardly be called an appearance.

The coloration of these waters is a very curious phenomenon.

The English government presents, just now, a curious phenomenon.

A curious phenomenon occurs around this time in some of my city's poorer districts.

In a moment, the curious phenomenon of warmth began to repeat itself.

There is, for instance, the curious phenomenon of the "double life."