unsolved mystery

However the case still has been considered an unsolved mystery.

What happened to this piece is still an unsolved mystery.

However, the identity of the mother is an unsolved mystery.

Who made it, how, and why are still unsolved mysteries.

Now, we have a greater understanding, but there are still unsolved mysteries of the mind.

There are still many gaps in knowledge, and unsolved mysteries.

His investigation further leads him to an unsolved mystery 20 years ago.

It was horrid to leave an unsolved mystery behind too.

Since then there has been much speculation about her death, but it remains an unsolved mystery.

Perhaps the biggest unsolved mystery that the authors might know something about is what happened this past summer.

There is some unsolved mystery which Jack tries to explore.

And lack of resolution can go deeper than unsolved mysteries such as these.

Popular news media of today sometimes casts the tower as an unsolved mystery.

It's one of those big unsolved mysteries that capture the public imagination.

Whatever happened to the Champion is one of the fleet's great unsolved mysteries.

The Defiant was, after all, more than simply an unsolved mystery or engineering challenge.

It could make one of those unsolved mystery features.

If it remains among the unsolved mysteries, we must accept that as the will of fate.

Along with their unsolved mysteries, they must face the evil forces that once tormented them.

Harold Young's disappearance would take its place with other unsolved mysteries in the records of the police department.

That is what they are paid to do of course; why anyone else should care is the real unsolved mystery.

An unsolved mystery, vague recollections of a photograph in an old magazine.

Of course, that's what makes unsolved mysteries so intriguing.

But he was always conscious of the swiftly passing days, and the unsolved mysteries around them.

With no further investigation, the case had, since then, gone cold over the years, eventually acquiring the status of an unsolved mystery.