Answer:
Only two backbones and thousands of ribs.
When there is fire in me then I am still cold. When I own your true love’s face then you will not see me. To all things I give no more than I am given. In time I may have all things, and yet I can keep nothing.
Brown I am and much admired; many horses have I tried; tire a horse and worry a man; tell me this riddle if you can.
Thirty white horses on a red hill, first they champ, then they stamp, then they stand still.
What holds names and memories which are not its own?
What did the piece of wood say when he saw the screwdriver and screws approaching?
Difficult
Animal
Easy
Food
Funny
Kids
Logic
What am I?