A STACK OF KNOWLEDGE
'(<a href="http://www.j-archive.com/media/2011-04-05_J_12.jpg" target="_blank">Sarah of the Clue Crew shows some anatomical diagrams on the monitor.</a>)  Despite the vast difference in their heights, a human and a giraffe both have 7 of these bones in the neck, stacked one on top of the other'
vertebra