Guides often ask guests a trick question.
How many bones in a giraffes neck?
Or to be precise how many vertebrae in a giraffes neck?
Well, the answer is seven.
The crazy thing is that all land mammals actually have no more or less than seven vertebrae in the neck. The vertebrae are just longer or shorter according to what evolutionary path that particular species has taken. In the case of the giraffe we could assume it revolves those longer than usual vertebrae to get rid of browsing competitors, but it only competes with the African elephant for rich sun soaked leaves high up in a tree canopy.