The tunnel is more than a mere curiosity to astronomers.

It might have been mere idle curiosity; but he could take no chances.

Far from a mere curiosity, it is an elevated form of the perception everyone already has.

It was not mere curiosity, though I have my share of that.

At first, it had been little more than mere curiosity.

But more than mere curiosity had led her to peer around the edge of the door curtain.

For them, the stories of saints were not mere curiosities.

Until she knew that, her footage was a mere curiosity.

Out of mere curiosity, I took the opportunity for a closer look at you.

So it is in mere curiosity that I make my queries.