image credit: Leendertz ccKopi luwak is a rare and prized variety of coffee. Kopi luwak refers to the beans of coffee berries once they have been eaten and excreted by the Asian Palm Civet. Producers of the coffee beans argue that the process may improve coffee through two mechanisms, selection and digestion.
It's the most expensive coffee in the world with retail prices reaching $700 per kilogram. This article is by Professor Massimo Marcone who explains the science behind Kopi luwak.
