Riddle 02

Дмитрий Бек-Лемешев
It is a round palace / without a door.
Inside it there is a bright yellow core.
For somebody new / it's a safe comfy cell
Until the walls, fencing it, / finally fell.

A new life is kept there until one day comes,
The roof of the palace cracks through into lumps.
There comes a new creature, uncertain, afraid...
Not knowing this world, in the search for some aid.