The importance of 'Las Tres Sisters'
Marta Méndez Cross and Cristo Fernández not only star in 'Las Tres Sisters', they're also involved in getting it made. Marta ...
Lots of people live past 90 in this tropical locale — these ‘three sisters’ are part of their diet
Residents of the Costa Rican peninsula Nicoya routinely live to be 100 thanks to the "three sisters" of agriculture.