Can a potato last 20 years? Bolivian farmers share their secret

Forced by the pandemic to swap city living for the rural life they had left behind, Egberto and Prudencia fell back on an old family tradition. Last winter, this Bolivian couple began making chuno using a technique widespread in the Andean region to preserve potatoes through a natural freeze-drying process which allows them to be eaten decades after they are dug up.

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