In all, the passage from the core takes many thousands of years.

It is possibly built from the core of an even older building.

From its core, it spreads east, north and south along the river.

Taking heat energy out from the core made the Sun more unstable.

Most of that time had been spent crossing deep space from the core to Earth.

"There's not enough heat coming up from its core to warm a cup of tea."

This energy then travels from the core to the surface of the Sun.

Here I suppose they'd try to cut off the wings from the core.

The air was clear as glass, for now mankind drew its energy from the core of Earth itself.

However, we can soon expect another excavation from the core.