Hank gets real with us in a discussion about evolution: it's a thing, not a debate. The distribution of genes evolves over time, over successive generations, to give rise to diversity at all levels of biological organization.

Contents
1) The theory of evolution 1:49
2) Fossils 2:42
3) Homologous structures 4:36
4) Biogeography 7:02
5) Direct observation 8:52

The references:
http://www.hisl.ent.msu.edu/discussion/Miller_et_al_2006.pdf
http://www-personal.umich.edu/~gingeric/PDGwhales/Whales.htm
http://evolution.berkeley.edu/evolibrary/article/history_16
http://www.thomsonedu.com/community/russell/Russell_19_401-418%2012.pdf
http://articles.latimes.com/2010/jul/28/science/la-sci-marsupial-20100728
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC2555653/pdf/bullwho00311-0137.pdf
http://news.nationalgeographic.com/news/2008/04/080421-lizard-evolution.html

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