Answer:
Only two backbones and thousands of ribs.
What measures out time. Until in time all is smashed to it?
What is often returned but is never borrowed?
This thing runs but cannot walk, sometimes sings but never talks. Lacks arms, has hands; lacks a head but has a face.
It can pierce the best armor and make swords crumble with a rub, yet for all its power It can't harm a wooden club.
If lightning strikes an orchestra who is the one most likely to get hit?
Difficult
Animal
Easy
Food
Funny
Kids
Logic
What am I?