Next moment the Ghost gave a scream of agony such as I never heard on Earth.

"That's what we heard back on Earth at any rate," Worrell said.

He had heard the tales of the early planetary wars on Earth.

It spoke in a language that perhaps had never before been heard on Earth.

He had heard nothing from the Songhouse in his years on Earth.

I heard about the failure of the power grid on Earth.

He had heard of similar examples in some of the drier areas on Earth.

The most awful sound yet heard on Earth shattered the air.

The statement mirrored some that he had heard on Earth, as this crisis had built and brewed.

Why didn't we hear of it on Earth?