THREE RIDDLES

1. What has two backbones and a thousand ribs?
2. Name two things - one has an eye, but no head. The other has a head, but no eye.
3. What satisfied comment by Hamlet has to do with the neck, foot, and back?

Answers:

1. Railroad track
2. Needle and pin
3. "Ay, there's the rub." 

Credit:
#3: LA Times Crossword
March 20, 2015
Ed Sessa (adapted) 

NOTE: #2 - same riddle by Christina Rossetti (1830-94) - perhaps original to her.

There is one that has a head without an eye,
And there's one that has an eye without a head.
You may find the answer if you try;
And when all is said,
Half the answer hangs upon a thread.