The mechanisms of evolution can be difficult to understand because evolution does not follow any defined plans and thus gives rise to adaptations whose paths are sometimes surprising. This video shows an example of this "blind" and "imperfect" evolution : the course followed by the laryngeal nerve in giraffe.

This example clearly shows that evolution doesn't follow the most direct path nor the most logical or effective one... Evolution is a blind mechanism which builds on what is already in place. As long as it's working, it's working!

 

Learn more:  watch a short animation that aims to rectify common misconceptions about evolution such as the "survival of the fittest" or evolution's "goal"...