Mapping rainforest chemistry from the air reveals 36 types of forest
Chemical signatures of the Peruvian tree canopy reveal previously unrecognized biodiversity

COMPLEX CANOPIES A single hectare of Peruvian tropical forest is shown in natural color (left) and in colors that correspond to as many as 23 different chemicals. The images, taken from a plane, reveal a surprising level of complexity within the forest.
G. Asner/Carnegie Institution for Science
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