1.   Clearly, an uncharted region of impeachment doldrums had been entered.

2.   Scientists liken them to signposts or bookmarks, because they serve as reference points in uncharted regions of DNA, landmarks to help biologists locate genes they are hunting.

3.   The new series would be centered on a marooned starship, beset by unfathomable interstellar forces during a battle with space guerrillas and cast into uncharted regions.

4.   This creates a marvelously charged setting in which Emma can, finally, explore the uncharted regions of her own heart.