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 Brian 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/