Human embryos form a tail! Unlike the vast majority of vertebrates, humans don't have tails (& neither do chimps, bonobos, gorillas, or orangutans, our 4 closest living relatives!), yet we form one in embryonic development, just to have it largely resorbed & fused to form our coccyx. Human embryos also start off with the eyes on the side of the head, like the eyes of adult and embryonic fish; our eyes must migrate toward the front of the face to end up in the human-appropriate location. Human embryos also start off with a very fishlike arrangement of aortae & aortic arches, which then require much remodeling to arrive at an arrangement appropriate for humans. Also, human embryos form fishlike pharyngeal arches, & even pharyngeal slits transiently.
![human_tail8.jpg](http://evolutionfun.com/images/content/human_tail8.jpg)
![249044d1298365626-humans-tails-e.gif](http://www.documentingreality.com/forum/attachments/f149/249044d1298365626-humans-tails-e.gif)
![human-tails-keralites.net15%5B1%5D.jpg](https://lh4.googleusercontent.com/-YfwccZQILpM/TYya0JgneOI/AAAAAAAAASw/6pYHeCWbXEg/s1600/human-tails-keralites.net15%5B1%5D.jpg)
![Human-Tail-4-150x150.jpg](http://www.1000funfacts.com/wp-content/uploads/2011/01/Human-Tail-4-150x150.jpg)
![c1.jpg](http://www.indianpediatrics.net/july1999/images/c1.jpg)