Wow. Our experiment is off to a great start—let's see if we can finish it off sooner than expected.
Coffee is grown around the world, from Kenya to Costa Rica, and is the world's second-most valuable commodity after oil -- but it may be in danger of extinction.
According to NEW SCIENTIST, the crops on those far-flung plantations nearly all derive from a handful of varieties of the arabica bean. Because there's so little genetic variablity among the cultivated plants, they're highly vulnerable to disease; coffee rust, for instance, devastated the Brazilian crop in the 1970s.