About one in every 500 of us is carrying around an extra one of these. What are they?  We sure had fun trying to get the right answer to this nearly Impossible quiz!!   Do you get it right?   We had sets of keys, pairs of socks, and a multitude of other answers then finally we had someone get this one right!!

ANSWER: Ribs. The extra cervical rib tends to developabove the normal first rib.