Heart of Darkness

This is the story of two diseases, and two theories about where one of them came from. Want 15% off an annual subscription to MasterClass? Go here: http://masterclass.com/theconstant Get $75 credit to upgrade your job post at indeed.com/theconstant Get 10% off your first month of online counseling by visiting: http://betterhelp.com/theconstant​ Visit our Patreon here. You too can get ad-free, early episodes, starting now!​​ BUY OUR MERCH, YOU FILTHY ANIMALS! The Constant is part of the Airwave Media podcast network.​​ ​Interested in advertising on The Constant? Email [email protected] to get on board! Learn more about your ad choices. Visit megaphone.fm/adchoices