The traditional reaction is slow and thus requires high temperatures.

To date, most attempts to do this have required extremely high temperatures.

The temperature required is so high that it would only have been reached shortly after the big bang.

The species requires temperatures at or above 34 degrees Fahrenheit.

This barrier can be overcome by heat, requiring high temperatures.

In general as the pressure decreases, so does the temperature required to boil a liquid.

"It doesn't require cold temperatures, that's for sure," he said.

Unlike the making process, the working of glass required significantly lower temperatures and substantially less fuel.

Plants require four things to grow: nutrients, light, water, and moderate temperatures.

The temperature required to smelt iron and steel was high enough to deal with one small human body.