And here we are dealing with mysteries 500 years old.

That's about older mysteries, and not about this world at all.

They will need to solve a centuries old mystery to save the earth.

The old mysteries have given way to a new style.

"And along with setting the timeline straight, we solved a centuries old mystery."

She was the oldest mystery going right now.

As always happens in science, the old mysteries are dispelled only to be replaced by new ones.

Thank you for clearing up an old mystery.

I thought you might have come to solve an old mystery.

He was drawn by all the old mystery of fire.