"I know you are of the world which you call Earth," he said.

Earl is looking for his home world, a planet called Earth.

In the 30th Century, the planet is now united under one country called Earth.

He'll call Earth and get my story confirmed as well as he can.

"I am a human, born of the world called Earth," he answered slowly.

Most of it is covered with water, but it's still called Earth.

"I'm one of those people from what you call civilized Earth."

Tell me: have you ever heard of a planet called Earth?

He had no power over such matters on this place called Earth.

And around one of them circled a little blue planet called Earth.