Answer:
It's equally comfortable in an orchestra and a geometry textbook. What is it?
the day before yesterday tom turned 15 next year he will turn 18 when is his birthday
A little house full of meat, no door to go in and eat.
Only two backbones and thousands of ribs.
Through its wounds, water does run. It once held many but now has none. What is it?
Walk on the living, they don't even mumble. Walk on the dead, they mutter and grumble.