At the forest’s edge, a scientist is giving a lesson on the mushrooms that grow here in the damp ground around the trees of Toui-Kilibo reserve in Benin. Olyvia Fadeyi is a mycologist – she studies fungi – and is teaching the women from the village of Yaoui how best to harness the economic value of this strangest of crops. Mushrooms can be cultivated year round, in back gardens, on vertically stacked shelves, rather than waiting for the naturally abundant ones in the rainy season.