To Ireno Vega and his wife, Zulma Chávez Bustamante, the existence and knowledge of how to grow and prepare yerba mate, an ancient Guaraní tea, represents more than a means to make a living. “It means ...

Everywhere you go in Argentina or Uruguay, you’ll see people engaging in an old and much-loved ritual: sipping a hot, slightly bitter infusion of caffeinated leaves from a dried gourd through a ...