But seeing his mother make the transition into this alien environment, he started forward.

You're about to enter one of the most alien environments that any human has ever known.

Music like this can only come from some sort of alien environment.

It is considered an alien environment much like what existed on early Mars.

Therefore, he reached back into ancient skills once learned as play and adapted them to an alien environment.

Inside, he and Rachel find what can only be an alien environment.

This is a totally alien environment, in case you haven't noticed!

"It was not an alien environment to anyone there," he said.

Take away from my past the long childhood in an alien environment.

Sounds of an alien environment might cover her enemy's approach.