But mind and soul are made of a mysterious substance which cannot be pinned down.

As he carried it out, the mysterious substance glowed with a white radiance!

He injects her with a mysterious substance in a syringe.

Be it a scientific- seeming or a mysterious substance, I wouldn't really act any differently.

He still held the piece of mysterious substance between his fingers and now he looked at it again.

Staring into the bowl at the mysterious substance, Margaret was suddenly frozen with fear.

They hope that further study will provide clues to the genesis, and the role played by a mysterious substance called "dark matter."

When he presented hers, she found flakes of the mysterious substance floating on the surface.

And go to space as often as her father can get some mysterious substance called funding.

It was made from some mysterious substance the like of which he had never seen before.