Answer:
Only two backbones and thousands of ribs.
who do you think you know but sometimes you don't
What word is a plural, but when you add an "S" to the end, it becomes singular?
Die without me, never thank me. Walk right through me, never feel me. Always watching, never speaking. Always lurking, never seen.
They have not flesh, nor feathers, nor scales, nor bone. Yet they have fingers and thumbs of their own. What are they?
What language does a billboard speak?
Difficult
Animal
Easy
Food
Funny
Kids
Logic
What am I?