There is also much that is unknown about the general.

There is nothing unknown about the way it works.

Much remains unknown about the electoral landmark that ended white rule.

Much is still unknown about the family's estimated $45 billion in assets.

However, much was still unknown about fission and chain reaction systems.

In an interview after his speech, he said the use of chemical weapons was still the greatest unknown about the coming battle.

Of course, much is still unknown about the role the Taliban played in the hostage ordeal.

There are still things unknown about it, but we have a real basis for action.

Much remains unknown about the exact extent of its spread.

In Romania, there is still a great deal unknown about this issue.