Answer:
Sharp and long, flag of the world. What is it?
A circle of stones, never in rows. Stacked one on the other, mystery it sows. What is it?
I grow for a surface, even if you cut me. I continue to grow even after death.
Although my cow is dead, I still beat herΒ What a racket she makes.
What is that which, though black itself, enlightens the world without burning?
If itβs information you seek, come and see me. If itβs pairs of letters you need, I have consecutively three. What am I?