Einstein once wondered aloud whether "God had any choice" in creating the universe.

It struck Frank that he had never once wondered what they would look like.

And I once wondered if there was room at the top.

"People in hell," he once wondered aloud before an audience.

Popular Mechanics magazine once wondered at this monumental engineering feat.

I remember once wondering whether she was a cripple.

I must admit to wondering once or twice whether he was more legend than alive.

Used to wonder once in awhile what he used to do that made him need so much protection now.

He never once wondered why his pursuers were after him.

Reggie had more than once wondered if Smith was even human.