Although that was a year in which some music lovers complained that they heard all too much of the composer, Mozart's life had remained balletically unexplored.

The offshore area in Eritrea has largely remained unexplored, with only eight wells drilled between 1965 and 1977.

Several miles of cave passage have been surveyed, with many sections of the cave remaining unexplored, due to filled-in areas blocking passage.

Desai also noticed that there were too many characters in the book, most of them remaining unexplored.

It is no surprise that the nature of the work relationship between parents and nannies has remained invisible and unexplored.

Yet the 45 years that East Germany spent under Communist rule has remained largely unexplored.

Animal husbandry, piggery and fisheries etc. have good potential, but this sector has still remained unexplored.

Two "windows" in a vertical shaft at depths of 220-250 m were documented on the cave map but remained unexplored.

These extraliterary genres have remained largely unexplored.

Even supposing that the interior of America had remained unexplored, Gibbon's remarks about Albania would still have been true through 1990.