And everything you need/want to know about it.

So what exactly is Prime Rib?
‘To locate the prime rib, start by cutting your favorite cow neatly down the center from head to tail along the spine. Set aside one half for another use. Place your hand on its back and feel your way backwards along its vertebrae until you start feeling ribs. Count backwards to the sixth rib (this is called, appropriately enough “Rib #6”), and cut here.
Now continue counting back until you get to Rib #12 and cut again. Reserve the head section and the tail section for another use, saving just the ribs you just cut out. Now saw the ribs off at about 13 to 16-inches down their length and set aside the belly section. Take off the hide, and what you’re left with is the prime rib.’

And the link to the whole story:

http://tinyurl.com/primeribohyeah
http://tinyurl.com/primeribohyeah
http://tinyurl.com/primeribohyeah