FWIW, it's called the recurrent laryngeal nerve: http://en.wikipedia.org/wiki/Evidence_of_common_descent#Recurrent_laryngeal_nerve_in_giraffes http://en.wikiped

FWIW, it's called the recurrent laryngeal nerve: http://en.wikipedia.org/wiki/Evidence_of_common_descent#Recurrent_laryngeal_nerve_in_giraffes http://en.wikipedia.org/wiki/Evidence_of_common_descent#Recu... That's a popular example, but Wikipedia has another example (mentioned in the same section) which I was unaware of: the vas deferens in human males, which unnecessarily loops over the ureter. You learn something new every day...