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The Science of Coffee

The Science of Coffee

By: James Harper
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The Science of Coffee is a journey into coffee’s hidden microscopic secrets to help you make even better coffee at home. Documentary maker and coffee professional James Harper travels the world and speaks with leading coffee scientists to help you appreciate coffee more deeply. You are going to get taken into the science of water, coffee extraction, plant genetics, espresso technology, latte foam, sonic seasoning, our sense of taste and smell, organic farming, roasting, grinding and freshness, and how to think like a scientist. Press the Subscribe button so you don’t miss future episodes! The Science of Coffee is a spin-off series from James Harper’s documentary podcast Filter Stories. Follow James on Instagram: https://bit.ly/2Mlkk0O Listen to Filter Stories: https://bit.ly/3ajoT5Copyright 2024 All rights reserved. Art Cooking Food & Wine Science Social Sciences
Episodes
  • Farm to port: why specialty costs more
    Jun 23 2025

    Every time we open a bag of beautiful specialty coffee — like Erick Bravo’s from Finca El Chaferote in Huila, Colombia — we’re drinking something that’s been on a long journey.

    And I mean long! Over 1500 kilometers north up and down the Andes mountain range, a distance more than twice the height of France.

    Along the way, it passes through dozens of hands, machines, and decisions. We follow it through muddy mountain sides, dusty dry mills, and hurricane-battered coastal warehouses — places where all kinds of things can go wrong. A leaky roof. An overly aggressive polishing machine. Or even theft.

    But here’s the mystery: getting Erick’s coffee to port costs 50% more than sending a commodity coffee through the same route.

    Why?

    That question led me deep into Colombia’s coffee supply chains — and what I found changed how I think about the real cost of treating coffee with care.

    Please spread the word about The Science of Coffee! Leave a 5 star rating on Spotify Follow me on Instagram and tag me in an Instagram story Write a review on Apple Podcasts

    Discover how I make these Filter Stories episodes by subscribing to my Substack newsletter

    Find your next favourite Colombian coffee from The Coffee Quest

    Taste coffees from Erick Bravo’s award winning farm, Finca El Chaferote, and follow him on Instagram.

    Season 3 of The Science of Coffee is made possible by these leading coffee organizations:

    The Coffee Quest | BWT | TODDY | Algrano | Probat

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    54 mins
  • Why one Colombian farmer chose specialty —and the other walked away
    Jun 9 2025

    I travel to Colombia’s Huila region to answer a question that’s puzzled me for years: if specialty coffee pays more, is better for the environment, and brews tastier cups—why don’t more farmers grow it?

    I speak with two producers in the same region whose choices couldn’t be more different. One stakes his future on specialty. The other opts out.

    Their decisions come down to more than passion or a hard work ethic. Instead, I uncover two starting conditions—often invisible to us buyers—that strongly shape whether a farmer chooses specialty at all.

    If we want to see more speciality coffee grown, we need to bring down the barriers to specialty. But first we need to understand what those barriers really are.

    The answers might surprise you. They surprised me.

    Please spread the word about The Science of Coffee! Leave a 5 star rating on Spotify Follow me on Instagram and tag me in an Instagram story Write a review on Apple Podcasts

    Discover how I make these Filter Stories episodes by subscribing to my Substack newsletter

    Find your next favourite Colombian coffee from The Coffee Quest

    Taste coffees from Erick Bravo’s award winning farm, Finca El Chaferote

    Nerd out on my farm profitability estimations

    Season 3 of The Science of Coffee is made possible by these leading coffee organizations:

    The Coffee Quest | BWT | TODDY | Algrano | Probat

    Show More Show Less
    47 mins
  • The hard business of selling beautiful coffee, part 2
    May 19 2025

    Volume. Cheap. Lame flavours. This is the traditional way of growing coffee in Brazil, and almost every farm does it this way.

    But what if you wanted to produce beautiful, distinctive flavours instead—and make a living from it?

    In this episode, we travel to Fazenda Paraíso in Minas Gerais, Brazil, where farmer Vicente Pereira and his daughter are on a steep learning curve finding buyers for their beautiful coffees.

    Part 2 explores what it looks like for a small Brazilian farm to find better buyers, and the challenge of achieving pricing power.

    Behind every beautiful coffee is a family story like this, but it’s a story we rarely get to see close up.

    Let’s take a closer look.

    Please spread the word about The Science of Coffee! Leave a 5 star rating on Spotify Follow me on Instagram and tag me in an Instagram story Write a review on Apple Podcasts

    Discover how I make these Filter Stories episodes by subscribing to my Substack newsletter

    Source your next lot of specialty green coffee on Algrano

    Listen to Firefly to hear a cautionary tale about a specialty farm failing because they couldn't find the right buyers.

    Try Fazenda Paraiso's and Sancoffee's coffees for yourself!

    Season 3 of The Science of Coffee is made possible by these leading coffee organizations:

    The Coffee Quest | BWT | TODDY | Algrano | Probat

    Show More Show Less
    39 mins

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