| Hank talks about some of the structures in our bodies that are "leftover" from previous evolutionary phases of humanity. Like SciShow on Facebook: www.facebook.com Follow SciShow on Twitter: www.twitter.com References for this episode can be found in the Google document here: dft.ba tags: scishow, science, biology, vestigial structures, appendix, wisdom teeth, tailbone, charles darwin, on the origin of species, vestige, evolution, evolve, goosebumps, coccyx, nictitating membrane, eyelid, evolutionary biology, hank green |