Today we examine this amazing, spine-backed Mammal-like Reptile or Synapsid! We will try to answer questions like: Did dimetrodon have fur? How did dimetrodon walk? And what is the deal with dimetrodon's back? Sources: http://www.bioone.org/doi/abs/10.3158/2158-5520-5.1.104 https://en.wikipedia.org/wiki/Synapsid#Skin_and_fur http://pre10.deviantart.net/41f8/th/pre/f/2015/184/c/a/dimetrodon_head_by_traheripteryx-d8zsney.png http://mattpostsarthere.blogspot.com/2013/07/wrinkly-greasy-inostrancevia.html https://books.google.com.mx/books?id=N524Vah8MRAC&printsec=frontcover&source=gbs_ge_summary_r&hl=es-419#v=onepage&q&f=false https://en.wikipedia.org/wiki/Estemmenosuchus http://phenomena.nationalgeographic.com/2014/02/07/sail-backed-dimetrodon-had-a-nasty-bite/ All Copyrighted Images belong to their respected owners: - A ton of Dimetrodon drawings! by Traheripteryx (http://traheripteryx.deviantart.com/) (Thank you so much Nic) -Dimetrodon: smallest and largest by PLASTOSPLEEN (http://plastospleen.deviantart.com/) -Dimetrodon giganhomogenes and Shark by PLASTOSPLEEN -Dimetrodon limbatus - colored by Xiphactinus (http://xiphactinus.deviantart.com/) -Drop the sails, mateys! by Dontknowwhattodraw94 (http://dontknowwhattodraw94.deviantart.com/) -Fishing story by TarbosaurusBatar (http://tarbosaurusbatar.deviantart.com/) -Dimetrodon remake by titanlizard (http://titanlizard.deviantart.com/) Originally by http://tnilab-ekneb121.deviantart.com/ -Various Images by Dmitry Bogdanov (CC BY) -evolutionary tree showing the evolution of tooth serrations in Dimetrodon. From Brink and Reisz, 2014 -The skull of Dimetrodon with a close-up of a section of the tooth serrations. Art by Danielle Dufault, courtesy Kirstin Brink. -Wooly Rhino Skeleton by Didier Descouens (CC BY) -All Todays Rhino by CM Kosemen -Cougar by Art G (CC BY) This video is published under the creative commons license. This video is protected under FAIR USE for reasons of Commentary, Edu