You can then use the difference in temperature between this hot region of the box and any cooler region, to drive a heat engine.

Such planets may form in cooler regions farther from the central star.

Sometimes he could look directly down into one of them, to see darker, cooler regions far below.

This cool windy region seemed fertile, in its way.

This tree is unusual as it grows in cooler regions, subject to frost and occasional snow.

But warming in cool regions can bring mixed results, the draft says.

However recently those from the country's coolest regions can be fine examples.

Being a montane plant, it does well in cooler regions.

The northern portion is a cool growing region, but one with a very long growing season.

Cinquefoils grow wild in most cool and cold regions of the world.