Planetary engineering is the practice of deliberately modifying the environment of a planet or moon to suit the needs of a particular population or to make it habitable for humans.

The place value of the digit 5 in the number 352 is 50.

She loves to play-act and often participates in community theater productions.

Let's play the pronoun game.

The placebo button does not actually do anything.

I have a backup plan in case plan C fails.

She loves to play tricks on her friends.

He hit the ball plain and simple.

He hit the plain ball into the corner pocket.

Elon Musk's vision is to create a multi-planetary civilization.