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‘Leaf Wonder’ In A World Of Changing Forests

Enlarge this image Denis Tangney Jr./Getty Images In Autumn, the receptors in our primate eyes revel in the red and gold of trees. Our ability to perceive red color is an oddity, one shared by our cousins the Old World monkeys and apes, but not by most other mammals. Evolution endowed our ancestors with an extra type of light-sensing cone cell that helped them see fruit and edible young foliage against a background of mature dark green leaves. Nowadays, we’re still looking at tree leaves, but no longer as food….

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