We continue our story about the beginnings of hair dye with Val Burba! Surprise surprise, there's nazis in this episode too! As always your host is Dylan Gardner  and music by Gwen Mylls.

https://set.adelaide.edu.au/news/list/2019/08/20/why-is-the-colour-blue-so-rare-in-nature#:~:text=Blue%20is%20a%20very%20prominent,far%20fewer%20animals%20are%20blue. 

https://www.quantamagazine.org/why-are-plants-green-to-reduce-the-noise-in-photosynthesis-20200730/ 

https://www.sciencedaily.com/releases/2020/06/200625144900.htm 

https://en.wikipedia.org/wiki/Picric_acid 

https://en.wikipedia.org/wiki/Hair_coloring#cite_note-30 

https://en.wikipedia.org/wiki/Eug%C3%A8ne_Schueller 

https://www.smithsonianmag.com/history/titan-who-founded-loreal-built-his-brand-shoulders-nazis-180964805/ 

https://en.wikipedia.org/wiki/L%27Or%C3%A9al#History 

https://web.archive.org/web/20120505045702/http://gladwell.com/2011/2011_03_28_a_color_of_money.html 

https://www.forbes.com/2005/03/18/cz_sh_0318oreal_bill05.html?sh=201cbbb975fc 

https://www.forbes.com/static/bill2005/LIRF6EZ.html?passListId=10&passYear=2005&passListType=Person&uniqueId=F6EZ&datatype=Person 

https://web.archive.org/web/20110604000405/http://www.time.com/time/magazine/article/0,9171,157348,00.html 

https://books.google.com/books?id=nDYVAAAAQAAJ&pg=PA82#v=onepage&q&f=false 

https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3634302/ 

https://www.ajol.info/index.php/ajnt/article/view/57599