Much research has been conducted to explain how (and if) life could spontaneously form.

The committee was formed spontaneously as work proceeded in the other areas.

The lower an insects' body temperature, the more likely it is that ice will begin to form spontaneously.

Am-241 is formed spontaneously by the beta decay of plutonium-241.

As an example, it is far more probable that ice will form spontaneously in boiling water.

Small parties can form spontaneously, but large ones usually require a fair amount of planning and preparation.

Quite interestingly, he had seven locks of hair, formed spontaneously over his head.

At that time a group in Skopje was formed spontaneously.

They wouldn't realize it for many years, but the pattern of their lives formed spontaneously in that instant.

They were obviously a hunting pack, spontaneously formed and already experienced at their business.