Most people are surprised to learn that the incredibly long neck of a giraffe is supported by just seven cervical vertebrae - the same number as in humans (and I think most other mammals). The unusual length of the vertebrae is demonstrated nicely in this photo.
Photo found at ~Mein---Teil, via nrkn.
All mammals have the same number of cervical vertebrae except, strangely, for manatees and sloths. Maybe you could do a post on why this is?
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