Hank introduces us to the relatively new field of evolutionary developmental biology, which compares the developmental processes of different organisms to determine their ancestral relationship and to discover how those processes evolved. Also, fruit flies with eyes on their legs and chickens with teeth! References: http://www.biomedcentral.com/1741-7007/5/47 http://blog.hmns.org/?tag=evo-devo http://www.pbs.org/wgbh/nova/evolution/what-evo-devo.html http://www.hoxfulmonsters.com/2008/05/setting-the-stage-for-hox-genes/ http://evolution.berkeley.edu/evolibrary/article/evodevo_05 http://lepdata.org/monteiro/Evo-devo%20pdfs/Halder_et_al_1995.pdf http://www.npr.org/templates/story/story.php?storyId=5230538 Table of Contents 1) EVO/DEVO - 00:51 2) Developmental Regulatory Genes - 2:00 3) Gap Genes - 2:39 4) Homeobox / HOX Genes - 2:50 5) Messed-Up Experiment - 6:16 6) EVO/DEVO & Evolution - 7:26 a) Chickens with teeth - 8:14 Crash Course is on Patreon! You can support us directly by signing up at http://www.patreon.com/crashcourse Want to find Crash Course elsewhere on the internet? Facebook - http://www.facebook.com/YouTubeCrashCourse Twitter - http://www.twitter.com/TheCrashCourse Instagram - https://www.instagram.com/thecrashcourse/ CC Kids: null