Everyone knows giraffes have longer necks than humans, but how do our neck bones compare to theirs? Learners examine a human vertebrae X-ray, counting the bones and predicting how many might be in a giraffe neck. They use a research site from the San Diego Zoo to learn some fun giraffe facts, including how long one giraffe neck bone is. Researchers compile their data in a graph comparing human and giraffe necks.