Answer:
Where do you go in through one hole and come out through two holes at the same time?
What can you fold but not crease?
What lies in a tunnel of darkness. That can only attack when pulled back?
What moves without seeing and cries without eyes?
One by one we fall from heaven down into the depths of past, And our world is ever upturned so that yet some time we’ll last.
It weighs next to nothing but no one can hold it for long. What is it?