Marta Macedo is a postdoctoral researcher at the Interuniversity Center for the History of Science and Technology (CIUHCT), University of Lisbon. Her current work deals with imperial science, technology and agricultural commodities in the twentieth century. By following cocoa, from the field to the industrial spaces, she studies the way planters, experts, labourers, trees, machines, and laboratories built the colonial landscapes of São Tomé and Ghana. Using approaches from the history of technology, history of science, history of medicine and environmental history, she aims at understanding how specific technoscientific systems were set in place and how they helped to build and sustain Portuguese and British colonial power. Alongside with cocoa plants, Marta is also interested in the role of science and technology in establishing labor and racial relations.