When I was reading Richard Dawkins about evolution, one example stuck with me: the giraffe’s laryngeal nerve. It connects the larynx to the brain, but in a giraffe it runs all the way down the long neck, loops around the aorta, and then comes back up. Logically, it should run straight from the head to the larynx. But the giraffe evolved from a short-necked ancestor that already had this loop around the aorta. As the neck grew, the nerve simply stretched.