Show notes and links

http://www.cbc.ca/doczone/features/history-of-zoos

https://www.theguardian.com/science/lost-worlds/2014/aug/19/why-zoos-are-good

http://epubs.surrey.ac.uk/745893/1/Carr%20%26%20Cohen%202011.pdf

https://books.google.com/books?hl=en&lr=&id=Jp1fBgAAQBAJ&oi=fnd&pg=PT11&dq=morality+of+zoos&ots=uFAaFGtD1c&sig=shlu6SumdMtPek4-rnLkv-c8pl8#v=onepage&q&f=false