It created a forest where tidal mudflats had once existed.
Of the huge numbers that must have once existed, only a fraction remain.
A cafeteria had once existed in the State House, but it closed in 1990.
The ancients took it for granted that the Homeric heroes had once existed; some families claimed descent from them.
These are only a fragment of the student records that must have once existed and include those for 113 graduates between 1894 and 1963.
Wouldn't my students ask, "Isn't it possible that the Oral History had once existed, and even that it still exists?
America has deployed drones into these power vacuums, causing ferocious backlashes against central governments while destroying any positive image of the United States that may have once existed.
All told, the McKinney case might seem to mark a victory for ideas of sexual equity that had once existed only on the fringes of American culture.
These formations are significant because they suggest that running water may have once existed on Mars - one of the conditions needed to support life as we know it.
My presence was proof that my mother had once existed, just as they represented the physical legacy of their dead father.
