Some ideas are just plain hard to get rid of. Today we'll talk about one of the most tenacious ideas: the humors. Join us as we discuss all the evidence that should have clued people in to this being bunk such as your brain doing nothing but making snot, your arteries being full of air, and how the fix for literally any problem is to bleed you until you pass out.

Sources:

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

https://www.nlm.nih.gov/exhibition/shakespeare/fourhumors.html

http://www.greekmedicine.net/therapies/Hijama_or_Cupping.html

https://study.com/academy/lesson/the-four-humors-lesson-quiz.html

https://owlcation.com/humanities/The-Four-Humors

https://psychology.wikia.org/wiki/Four_Temperaments

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

http://www.medicalantiques.com/medical/Scarifications_and_Bleeder_Medical_Antiques.htm

https://www.youtube.com/watch?v=TiyYfOIe_7I

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