26Roundworm Puzzle
To solve a century-old puzzle of how roundworm infection transmitted from one host to another, 19th-century Italian doctor Giovanni Grassi self-ingested the roundworm eggs. He obtained the eggs from a human corpse, which was heavily infected with roundworms. After a month, he experienced stomach discomfort and found fresh eggs in his feces. He thus proved that the roundworm transmitted through the fecal matter of humans and was also the first person to demonstrate the direct life cycle of the roundworm.
27. The foot powder brand Pulvapies ran an ad during a 1967 Ecuadoran Mayoral election saying “Vote for any candidate, but if you want well-being and hygiene, vote for Pulvapues.” It was a harmless, relatively clever little tie-in to election season, and they could not have possibly thought anyone would take it seriously. The foot powder ended up winning the popular vote.
