Modernity is making you sterile

Cassava is a woody shrub native to South America. For people living in drought-prone tropical regions, it is a godsend: delicious, calorie-dense, and highly productive. The indigenous peoples of the Americas who first cultivated cassava are reliant on it and have developed an arduous, days-long process of preparation that involves scraping, grating, washing, and boiling the plant before it is eaten.