Opera-ballet seems destined to remain one of the last great frontiers in early music.

Where else can I find such a great frontier within such easy reach?

Maxxam can certainly afford to give back or even sell back part of America's great frontier before it is too late.

The oceans were the next great frontier, in more ways than one.

To many, the brain is the last great frontier of science.

This is the wedge that has pried open the last great frontier of America.

"It's one of the last great frontiers in the world in banking terms."

To get our entire species organized for the great new frontier.

The next great political frontier is an expansion of human-terrain mapping.

A. I'd tell them that they have a chance to work on one of the last great medical frontiers, which psychiatry could be.